82 



Equipment of the Biology Class Rooms. 



No. 50409 



50 411. 1 : 7. 



50 414. 1 : 8. 



50 420. 1 : 20. 



s. d. 

 0. 10. 



w 



50.409. Wall Arm for Electric Light, with outer globe of ruby glass, with switch . . . 



50.410. - The same, with yellow outer globe | 0. 10. 



50.411. Electric Dark Room Standing Lamp (F i g u r e), glow lamp with red outer globe 

 and socket with switch, together with 2 m flexible and screw contact for screwing in 

 Edison lampholders. Price without glow lamp 0. 13. 



50.412. Outer Globe for electric glow lamps, of extra thick ruby glass, with metal cap and 

 holder, without glow lamp (cf. Fig. 50,411) 0. 3. 



If glow lamps are already installed, it is only necessary to have one of these outer globes. 



50.413. --The same, of yellow glass 0. 3. 



50.414. Electric Dark Room Lamp (Figure), with chimney placed horizontally, adapted 



for checking purposes when developing plates 1. 4. 





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CD 



S3 



Q 



Equipment of the Biology Class Rooms. 



Tables for Biology Class Rooms. 8 d 



List No. 50,416 50,417 50,418 50,419 

 Length of Table m 2,5 3 3,5 4 



Price of Table 12. 8. 14. 6. 17. 1. 19. 0. 



The gross weights are given only approximately and hold for lath-packing: about 270 kg for a 

 length of 2.5 m, 310 kg for 3 m, 340 kg for 3.5 m and 375 kg for 4 m. 



The top is of 30 mm thick oak, being composed of frame and pannellings and coated thrice with 

 hot linseed oil. The body is of pitch-pine, is carefully stained and varnished, and the inner side 

 walls and bottoms are of red deal. It has 8 drawers and 2 cupboards. The table has gas and water 

 leads and, according to length, 2 to 4 gas taps with hose unions turned upwards; 1 to 2 water taps, 

 and, on one of the narrow sides, a white porcelain basin with draining valve and waste pipe. The 

 gas and water leads are laid complete down to the floor. 



50,420. Box for preserving Plants, for instruction in Botany (Figure): length 1.50 m, 



breadth 80 cm, height 60 cm 8. 5. 



The box is constructed of pitch-pine, rests on 4 legs, and is lined out with sheet zinc. Ten cm 

 above the bottom is a sheet zinc sieve for allowing the water to escape. The water can be carried off 

 by a tap. 



For Museum Cupboards, see pp. 43 46, and for Projection Lanterns and Diapositives, 

 see Special Section of this List. Scholars' Work Tables: prices on Application. 



Cl. 4158, 



4151, 3T1B. 



