Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 127
st allow for this by multiplying the required net area by 1 .5, to obtain the total or over-ail area. Example. Suppose we have a flue 10 inches in width and wish to use arejiister having a free area of 200 square inches. What will be the reciuiredheight of the register? 200 X 1.5 = 300 square… … VENTILATOR! FOR CORDS ^ ■■!■■ ^H HI HI^HH ^H ■ ■■■■ ■ ■«■■ ■!■■■ !■■■■ ■■■MB SIBSS ■■■■■■■■■■ ■ ■■■■ ^H ^H BH ii^l 1^1 1 pMAmB SBflHfll .. I...I,IIIIIL 111 11 Fig. 72. Wall Register with Pull Cords for Opening and Closing. Fig. 73. Plain Lattice Pattern Register. Bestfor Schoolhouse Work. 30-inch…
Architecture · Building · Carpentry
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