es ▁and ▁o vens ▁in ▁order ▁to ▁help ▁with ▁easier ▁clean ing . ▁ ▁Mason ry ▁o ven : ▁Mason ry ▁o vens ▁consist ▁of ▁a ▁b aking ▁chamber ▁made ▁of ▁fire proof ▁brick , ▁concrete , ▁stone , ▁or ▁cl ay . ▁Though ▁tradition ally ▁wood - f ired , ▁coal - f ired ▁o vens ▁were ▁common ▁in ▁the ▁ 1 9 th ▁century . ▁Modern ▁m ason ry ▁o vens ▁are ▁often ▁fired ▁with ▁natural ▁gas ▁or ▁even ▁electric ity , ▁and ▁are ▁closely ▁associated ▁with ▁art is anal ▁bread ▁and ▁p izza . ▁In ▁the ▁past , ▁however , ▁they ▁were ▁also ▁used ▁for ▁any ▁cook ing ▁task ▁that ▁required ▁b aking . ▁ ▁Mic row ave ▁o ven : ▁An ▁o ven ▁that ▁cook s ▁food ▁using ▁mic row ave ▁radiation ▁rather ▁than ▁inf ra red ▁radiation ▁( typ ically ▁a ▁fire ▁source ). ▁Con cept ual ized ▁in ▁ 1 9 4 6 , ▁Dr . ▁Per cy ▁Sp encer ▁alleg edly ▁discovered ▁the ▁he ating ▁properties ▁of ▁mic row aves ▁while ▁studying ▁the ▁magnet ron . ▁By ▁ 1 9 4 7 , ▁the ▁first ▁commercial ▁mic row ave ▁was ▁in ▁use ▁in ▁Boston , ▁Mass . ▁ ▁To aster ▁o ven : ▁To aster ▁o vens ▁are ▁small ▁electric ▁o vens ▁with ▁a ▁front ▁door , ▁wire ▁ra ck ▁and ▁remov able ▁b aking ▁pan . ▁To ▁to ast ▁bread ▁with ▁a ▁to aster ▁o ven , ▁s lices ▁of ▁bread ▁are ▁placed ▁hor izont