▁a ▁list ▁of ▁string ▁quart et ▁compos ers , ▁chron olog ically ▁sorted ▁by ▁date ▁of ▁birth ▁and ▁then ▁by ▁surname , ▁whose ▁not ability ▁is ▁established ▁by ▁reliable ▁sources . ▁The ▁list ▁is ▁by ▁no ▁means ▁complete . ▁String ▁quart ets ▁are ▁written ▁for ▁four ▁string ▁instruments us ually ▁two ▁viol ins , ▁vi ola ▁and ▁cell oun less ▁otherwise ▁stated . ▁ ▁Born ▁in ▁the ▁ 1 7 th ▁century ▁Aless andro ▁Sc ar l atti ▁( 1 6 6 0 – 1 7 2 5 ): ▁Among st ▁his ▁output ▁of ▁chamber ▁son at as , ▁he ▁wrote ▁a ▁set ▁of ▁Son ate ▁a ▁quattro ▁per ▁due ▁viol ini , ▁vio lett a ▁e ▁viol on cel lo ▁senza ▁c emb alo ▁( c . ▁ 1 7 1 5 – 2 5 ). ▁ ▁Georg ▁Philipp ▁Te lem ann ▁( 1 6 8 1 – 1 7 6 7 ): ▁An ▁example ▁is ▁Son ata ▁á ▁Vi ol ino ▁I , ▁Vi ol ino ▁II , ▁Vi ola ▁e ▁Vi ol ono ▁in ▁A ▁major ▁T W V ▁ 4 0 : 2 0 0 . ▁There ▁is ▁an ▁expanded ▁version ▁for ▁chamber ▁string ▁or chestra . ▁ ▁Born ▁in ▁the ▁ 1 8 th ▁century ▁ ▁Born ▁in ▁the ▁ 1 7 0 0 s ▁Giovanni ▁Batt ista ▁Sam mart ini ▁( c . ▁ 1 7 0 0 – 1 7 7 5 ): ▁W rote ▁several ▁quart ets ▁though ▁as ▁with ▁many ▁early ▁works ▁for ▁the