and Laboratory Methods. 



2505 



inches in height, and nine feet in ex- 

 tension from the wall. In the second 

 the cases are seven feet long, four 

 feet wide, eight and a half feet high. 

 In the third the broader cases are 

 three feet in width, ten feet in length, 

 eight feet four inches in height ; the 

 narrower, two feet in width, eight feet 

 in length, eight feet four inches in 

 height. The partition, shelving, and 

 appearance of exhibits are indicated 

 in the photographs. 



In Fig. 50 some working details 

 are depicted (not in scale) of a pier or 

 pavilion case without partition or 

 diaphragm, for which I am indebted 

 to A. B. Strader ; a being the con- 

 struction of the wall of the case with 



Fig. 50. — Working details of a pier case. 



sashes, b the construction of the cornice, c that of the base. Pier cases, as 

 shown in Fig. 49, are frequently double-front cases or rectangular constructions, 

 detached from the walls, with a diaphragm or back passing from end to end 

 through the center. They are two wall cases back to back. Such cases are 

 useful and might advantageously replace all wall-cases where wall-cases cannot 

 be so favorably built as to receive the light from the windows. 



These double-front cases should be on heavy iron wheels or rollers, hidden 

 by a marginal skirt of wood or stone. And, indeed, all cases, where it is feasi- 



r 



Fig. .51. — Commendable forms of moulding cornices on wall cases. 



ble, should be movable. I have seen the most unfortunate strains given to cases 

 and the most unlucky injuries inflicted on men by the hardship of having them 

 shovea into new positions. 



A feature of some importance in wall cases of all kinds is the cornice. A 

 great many complicated and heavy designs may be resorted to, but it seems 

 obvious to good taste and judgment that the more simple are to be preferred. 

 At any rate, whatever combinations of fillet, ogive, or scroll are adopted it 



