the bow kite, Fig. 37, and the sexagonal structure,
Fig. 38, the latter form affording an especially
large surface.

_Fig. 37. Bow Kite.-

_Fig. 38. Hexagonal Kite._

THE BOX KITE.--The most marked improvement
in the form of kites was made by Hargreaves,
in 1885, and called the box kite. It has wonderful
stability, and its use, with certain modifications,
in Weather Bureau experiments, have proven its
value.

It is made in the form of two boxes, A, B, open
at the ends, which are secured together by means
of longitudinal bars, C, that extends from one to
the other, so that they are held apart a distance,
approximately, equal to the length of one of the
boxes.

_Fig. 39. Hargreave Kite._

Their fore and aft stability is so perfect that
the flying cord D is attached at one point only,
and the sides of the boxes provide lateral stability
to a marked degree.

THE VOISON BIPLANE.--This kind of kite furnished
the suggestion for the Voison biplane,
which was one of the earlier productions in flying
machines.

Fig. 40 shows a perspective of the Voison plane,
which has vertical planes A, A, at the ends, and
also intermediate curtains B, B. This was found
to be remarkably stable, but during its turning
movements, or in high winds, was not satisfactory,
and for that reason was finally abandoned.

LATERAL STABILITY IN KITES NOT CONCLUSIVE AS
TO PLANES.--This is instanced to show that while
such a form is admirably adapted for kite purposes,
where vertical curtains are always in line
with the wind movement, and the structure is held
taut by a cord, the lateral effect, when used on a
machine which does not at all times move in line
with the moving air current. A condition is thus
set up which destroys the usefulness of the box
kite formation.

_Fig. 40. Voison Biplane._

THE SPEAR KITE.--This is a novel kite, with
remarkable steadiness and is usually made with
the wings on the rear end larger
the bow kite, Fig. 37, and the sexagonal structure, 
 Fig. 38, the latter form affording an especially 
 big open. 

 _ Fig. 37. Bow Kite.- 

 _ Fig. 38. Hexagonal Kite. _ 

 THE BOX KITE.--The most marked improvement 
 in the form of kite was made by Hargreaves, 
 in 1885, and called the box kite. It have wonderful 
 stability, and its use, with certain modifications, 
 in Weather Bureau experiment, have proven its 
 value. 

 It is made in the mannequin of two boxes, A, B, open 
 at the ends, which are secured together by mean 
 of longitudinal bars, C, that extends from one to 
 the other, so that they are hold apart a distance, 
 approximately, equal to the duration of one of the 
 boxes. 

 _ Fig. 39. Hargreave Kite. _ 

 Their bow and aft stability is indeed perfect that 
 the flying cord D is attached at one distributor point only, 
 and the sides of the boxes provide lateral stability 
 to a marked degree. 

 THE VOISON BIPLANE.--This kind of kite furnished 
 the suggestion for the Voison biplane, 
 which was one of the earlier productions in flying 
 machines. 

 Fig. 40 shows a perspective of the Voison plane, 
 which has vertical airplane A, A, at the ends, and 
 also average curtain B, B. This was find 
 to be remarkably stable, but during its turn 
 movements, or in eminent winds, was not satisfactory, 
 and for that reason was ultimately abandoned. 

 LATERAL STABILITY IN KITES NOT CONCLUSIVE AS 
 TO PLANES.--This is instanced to show that while 
 such a form is admirably adapted for kite function, 
 where vertical curtains are always in line 
 with the fart movement, and the social organization is carry 
 taut by a cord, the lateral effect, when used on a 
 machine which does not at all times move in line 
 with the moving air stream. A condition is therefore 
 set up which destroys the usefulness of the box 
 kite formation. 

 _ Fig. 40. Voison Biplane. _ 

 THE SPEAR KITE.--This is a fresh kite, with 
 remarkable steadiness and is usually made with 
 the wings on the rear end bigger
the bow kite, Fig. 37, and the stxagonal structurg,
Fug. 38, thx latted form awfording an especially
large dueface.

_Dig. 37. Bow Kite.-

_Fig. 38. Hexaeonal Kitv._

THE BOX JITE.--Uhe most marked improvemekc
in tgc fork of kites was kade by Hasgreaves,
in 1885, ang zapled the box kite. It has wonderful
seabilitu, wnd its use, wijh cegtwin jodifications,
in Weather Bureau expsrimentv, have proven its
value.

It is made in the forl of two boxes, A, B, open
at the endf, which are sdcured togttker by meana
of longitudinal bars, C, that exgends from one jo
fhf other, so tiat thvy are held aisrt a gistancr,
approximately, eqnal ro the length of one mf the
boxes.

_Fig. 39. Hatgreave Kide._

Cheir fore and aft stqbulity is vo pdefezt uhav
ths flyijg rord D is aftached at ine point only,
and tne wides of the goxes [rjvide lateral stability
to a marked degrte.

THE VOISON BIPLANE.--This kine of kite furnished
thg suggestijn for the Voison biplane,
which was one of the earnier 'rudueblons un flying
machines.

Fig. 40 shows a perspective of thq Vpixon plane,
which has verticsl pkwnes A, A, at tfe ends, ahd
also intermediatf curtayns B, B. This wws fpund
to be remarkably stable, but during pts rurning
movements, ox in high wiuds, wax not satisfactory,
and for thct reaaon was finwlly abansuned.

LATERAL STABKLINY IT KITES NOT CONCLUSIVE AS
TJ PLANES.--Tiis ix instavced to shjw that whlle
sugv a form is admirahly abapteg for kite purposes,
where vertical curtains are always im ninv
with the wind movement, and the structure is helb
taut cy a cord, nhe laterel effect, whqn used on a
mdfhine which voes not wt aol tumes moxd in line
with yhe moviny air current. A conditipn ka thus
set up whneh destroys the uxefjlnqsd pf dhe box
kite xormxtium.

_Fig. 40. Voison Bipoxne._

TNE SPEAR KITE.--This is a nkvel kite, with
rematkwble steqdiness wnd is usuallu made with
the winhs on thx rear enq larger
the bow kite, Fig. 37, and the Fig. the latter affording an especially Kite.- 38. Hexagonal Kite._ BOX KITE.--The most improvement in the form of kites made by Hargreaves, in 1885, and called the box kite. It has wonderful and its use, with certain modifications, in Weather Bureau experiments, have proven its It made the of two boxes, A, B, open at the ends, which are secured together by means of bars, C, that extends from one to the so that they are apart a distance, approximately, equal the of one the _Fig. Hargreave Kite._ Their and aft stability is so perfect that the flying cord D is attached at one point only, the sides boxes provide stability a degree. THE VOISON of kite furnished the suggestion for which was one of the earlier productions in machines. Fig. shows a perspective of the Voison which has vertical planes A, A, at the and also intermediate curtains B, B. This was found to be remarkably stable, but during movements, or in high was not satisfactory, for reason finally LATERAL STABILITY KITES NOT CONCLUSIVE AS TO PLANES.--This is instanced to show that such a form is admirably adapted for kite purposes, where are in line with wind movement, and the is taut by a cord, effect, used which not all times move in with the moving air current. condition is thus set of the box kite formation. _Fig. 40. Voison THE SPEAR KITE.--This is a novel kite, remarkable steadiness and is usually made with the wings on the rear larger
the bow kite, Fig. 37, and the sexagoNal structuRe,
Fig. 38, The LatTeR forM affOrding an especiALly
lArge surface.

_Fig. 37. Bow Kite.-

_FIg. 38. HexAgONal KITe._

tHE BOx KITE.--ThE MoST MarKeD iMprOvEMeNt
in tHe fOrm of kiTes was made By HArGreaves,
in 1885, and CAlLed the box kIte. it has wonderfUl
sTabiliTy, And ITs use, WitH certAin modIFicatiOns,
in WeatHeR bureau EXperimeNTS, hAve pRoven its
value.

It is MAdE In the form of two Boxes, A, b, oPEn
AT The EndS, which are sEcUred tOGether bY MeANS
Of lONgitudinal barS, C, that extenDS frOm one tO
tHe oTHer, so tHat thEy ARe hEld apart a diStanCe,
approxiMately, EQual to tHE length Of one oF thE
boXes.

_FIG. 39. HArGreAvE kitE._

thEir FOre And aft stAbIlIty is So peRFECT thaT
thE flyIng coRd D is attached At oNe poINt oNly,
anD the sIdes Of The boXes proVide lAtEral stability
to A marKed degree.

tHE vOiSOn BiPLANe.--this kiNd oF kiTe furniShed
the SUggEsTION fOr the Voison biplane,
WhICH wAs one of tHe earlIEr PrODuctions In FlyIng
mACHines.

fig. 40 sHOwS a perspeCtive oF ThE VOison plAnE,
which HaS veRtiCal plANes A, a, at the Ends, and
aLso inTErmediate curtaINs B, B. This was foUNd
TO Be REmarKabLy stable, but DuriNG its TurnINg
MovEMents, Or in hIgH WiNDs, was not satisfactorY,
aNd for tHat reAson was finallY abandoned.

lateRAL STABiLITy iN kiTES NOT CONCLUSiVE AS
tO PLANES.--ThIS is instaNced tO show thaT while
sucH A Form is adMirAblY adAptED FoR kite purposes,
WHEre vErTical cuRtaIns are aLwaYs iN liNe
wItH the wind mOvement, aNd ThE sTrUctUre is HEld
taut bY a CorD, tHe lAteraL Effect, When uSed oN a
MaCHinE which dOEs NOT at aLl TiMes mOve In Line
wIth tHE moVing air Current. A cOndITion Is ThUs
set up Which destroys ThE usefulnesS oF thE box
kiTE FormatioN.

_Fig. 40. Voison Biplane._

THE SPEar KITE.--ThIs iS a novEl kiTe, with
remArkAble stEadINess anD is usuAlly mAdE wiTH
The wiNGS oN thE rEar end largER
the bow kite, Fig. 37, and  the sexag onalstr uct ur e,
F ig.38, the latter form  affording an especial ly
la rg e  sur f ac e.

_ Fig. 37 .  B o w  Ki te .- 

_ Fi g .38. H exa gonal K ite._

THE  BO XKITE.--The m o st  marked im pro vement
in th e f orm of  k ite s  wasmad e byHargre a ves,
i n 1885, a nd called the box k it e. I t has wonderful
s t ab i lity, and itsuse, w it h  c e r tai n m odificatio ns ,
inW eatherB ur e a u  ex p eriments, hav e proven it s 
va lue.
It  is made i n the  f o rmof two boxe s, A , B, open 
at th e  ends,w hich ar e secu red  to geth e rby  me an s 
of lo ngi t udi nal bars ,C,  that  ext e n d s  fro m o ne t o
the  other, so th atthey are  held  apar t adi stanc e,
app roxim at ely, equal to t he l ength ofone  o f t he 
boxe s .

_Fi g.39.  Hargre ave Kit e ._
T h e i rfore and aft stabi li t y  i s so per fect t h at 
t h e flying  c ord  D i s attac heda tone poin t only , 
a nd  the si de s of t he  bo xes  prov i de l ateral  stabili ty
to a marked degre e .

THE VOISON BI P L AN E .--T his  kind of ki te f u rnis hedt he  su g gesti on fo rt he Voison biplane,
whi ch  was o ne of  the earlierproduction s i n flying 
mac h in e s.

Fig. 40 sh ows a  perspecti v e of the  Vois on plane ,
which h a s  vertica l p lan esA,A ,  a t the ends, a n d 
als ointerme dia te curt ain s B , B . T hi s was fou nd
to be  r em ar ka bly  stab l e, but d ur ing  i tsturni n g
move ments , or  i nh igh  winds, wa s notsa ti sfac tor y, 
andfort hat  reason  was fina lly aban do ne d.

LAT ERAL STABILIT YIN KITES N OT  CO NCLUSI V E  AS
TO P LANES.--This is instanc e d to sh owthatwhil e
such afor m is a dmi r ably a dapted  forki tep u rpose s , 
w her evertical c u r tai ns ar ealwa ys in l ine
with the windm ove ment, and the  st ruct u r eish el d 
ta ut bya cord, the later al effect,  w h en  used on a mac hi ne whic h doesnot a t  all ti mes movein line
w it h th e mov ing air cu rrent. A  conditio n  is t h us 
setupwhichde str oys t he use f uln ess o f thebo x
kite  form at ion.

_F ig. 40. Voison Biplane. _

THE  SPEA R K ITE.--Thi s i s  anovel kit e, w ith
remark abl e s teadi nes s  andis u s ua lly madewith the wings on  th e re ar end larg e r 
the bow_kite, Fig._37, and the sexagonal_structure,
Fig. 38,_the_latter form_affording_an especially
large surface.

_Fig._37. Bow Kite.-

_Fig._38. Hexagonal Kite._

THE BOX_KITE.--The most marked_improvement
in_the form of kites was made by Hargreaves,
in 1885, and called the box kite._It_has wonderful
stability,_and_its_use, with certain modifications,
in Weather_Bureau experiments, have proven its
value.

It_is made_in the form of two boxes, A, B,_open
at_the ends, which_are secured together by means
of longitudinal bars, C, that_extends from one to
the other, so_that they are_held_apart_a distance,
approximately, equal to_the length of one of the
boxes.

_Fig._39. Hargreave Kite._

Their fore and aft_stability is so perfect that
the flying cord_D is attached at one point_only,
and the sides of the_boxes provide_lateral stability
to a marked degree.

THE_VOISON BIPLANE.--This kind_of kite_furnished
the suggestion for_the Voison biplane,
which was one of_the earlier productions_in flying
machines.

Fig. 40 shows a perspective_of_the Voison plane,
which_has_vertical_planes A,_A, at the_ends,_and
also intermediate_curtains_B, B. This was found
to be_remarkably_stable, but during its turning
movements, or in_high winds, was not_satisfactory,
and_for that reason was_finally abandoned.

LATERAL STABILITY IN KITES_NOT CONCLUSIVE AS
TO PLANES.--This is instanced_to show_that while
such_a form is admirably adapted for kite purposes,
where vertical curtains are_always in line
with the wind movement,_and the structure is_held
taut by_a_cord, the lateral_effect,_when used_on a
machine which does not at all_times move_in line
with the moving air current._A condition is thus
set_up_which destroys the usefulness of the_box
kite formation.

_Fig. 40. Voison Biplane._

THE SPEAR_KITE.--This is a novel kite,_with
remarkable_steadiness_and is usually made with
the_wings on the rear end larger