

121 



21 T Balance Case. The above illustration shows a rase t<>, six Halair.es suitable toi tmni; on w;ill 

 either on iron cantilevers let into the wall, or on wood bracket legs, over .ill si/<- 10 ft. 

 6 in. long, i8ir. wide, 24 in. high at front, and 29)11. high at l>;u k. dM>r ^p;u:c about _> > in. 

 wide, sliding doors counterpoised on lead weights hung over pulleys on catgut 

 All doors, ends, top and divisions of glass, framing of oak or mahogany polished with a 



tc'ik sole, I in- a! ove ill- 

 tion is shown for fitting against 

 the wa'l without auv b:u k . 



9 15 



Similar Cases fiin bt sufflitd t<> suit any 

 number a/ /iaianfts required anil any site. 



122 T Lecture Blackboard, with four 

 plate - glass writing surfaces, 

 each 5 ft. by.; ft., counter] 

 with lead \\vights, and hung on 

 catgut lines sliding over ! 

 pulley wheels. Pitrli pine fram- 

 ing and standards polished f'>r 

 fixing to walls ; total height, 

 12 ft. 



123 T Lecture Blackboard, as a i 



but with only two plite-gla^ 

 writing surfaces, each 5 ft. by 

 3 ft. ; total height, 10 ft. 6 in. 



23 10 



12 15 



122 



CHEMICAL AND SCIENTIFIC APPARATUS AND PURE CHEMICALS 



