glass down , while it will be observed on reference to the figures , that there is free play for expansion and contraction under the influence of variations of temperature . Mo air is admitted except such as is provided for by special ventilating arrangements in the construction of the roof , which… … Fig . 56 . A . TOP SQUARE OF ^ CLASS . ^ CONDENSATION BAR . C . BOTTOM SQUARE . \ mmm , ^ mmNETAL . CAR FOR TOR StJUAAB , condensed moisture , which ultimately falls outside the roof at the eaves , while the supporting bars bein fixed in the direction of the inclination of the roof , there is no…