No. 50421. 



Wainscotting for Lecture Rooms, with Blackboard Stands. 



83 



Wainscotting for Lecture Rooms, with Blackboard stands. 





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We employ only the best well-seasoned wood for the Wainscotting. blackboard stands, etc. 

 constructed in our workshops. As a rule the Wainscotting and frames are made of pitch-pine, as 

 this wood is the most suitable for the purpose. The table tops of blackboard stands are of oak, the 

 boards themselves being of poplar inlaid with slate, or they are constructed of red deal covered 

 over with linoleum, red deal being used for the inner walls and bottoms of the cupboards. The bottom 

 fillets of all articles of equipment are of oak. and have the edges rounded off so as to avoid an un- 

 sightly appearance should they be knocked. 



All pieces of apparatus, etc. to be fixed to the wainscotting, and all gas. water and electric- 

 leads are mounted in a thoroughly expert and reliable fashion, special care being taken with the 

 sliding boards, windows and with the projection screens to ensure ease of movement. 



A- it is of vital importance in these installations to ensure that good and sufficiently dry 

 wood is used, and that a thoroughly reliable joiner, brazier, mechanic and locksmith should be en- 

 trusted with the work, it is not advisable that offers of people on the spot be accepted because of 

 a slight difference in cost. 



In the case of these objects, it i- -M -ntially a question of durability, quality and fitness, 

 and it is not desirable to have them constructed by contract. 



We have selected the equipments described in this list from those which we have already 

 supplied, in order to bring before the notice of persons interested the essential facts in regard to the 

 fitting up of lecture rooms, and to show that we are in a position to execute orders of any magnitude 

 both for the simplest and for the most elaborate fittings. We are ready to submit designs and esti- 

 mates to suit existing conditions. 



In general, it is advisable to give preferance to the fittings described in this list, as drawings 

 and patterns of these are already available. 







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50,421. Equipment of the large Lecture Room of Chemical Institute I. of Berlin University 

 (Prof. Fischer). F i g u r e on p. 84 



The lecture table (Figure) is 18 m long, 80 cm wide, 95 cm high, and occupies the entire 

 width of the room. It is distant 1.60 m from the bark wall of the lecture room. For traffic there 

 is a passage 88 cm wide on each side 1.15 in from the window; at these place,* the table top is con- 

 tinued by flaps for an uninterrupted length of 18 m. In the centre of the table the top is cut away 

 for the lecturer for a length of 1.40 m and a depth of 20 cm. The space under the top is provided 

 with cupboards and drawers. 



The table contains: 



1 Pneumatic Trough, 88 cm long. 46 cm wide, 60 cm deep, of stout sheet copper, closed off in front 

 and behind by thick sheets of glass: with inlet, overflow pipe and draining valve. This can be 



illuminated by electric light. 



1 Mercury Trough, lined out with waxed cloth and fitted with a waste pipe: 70 cm long, 50 cm wide. 

 20 cm deep. In the centre is a stand on which to set the porcelain trough, this column being 

 raised by rack and pinion. 



1 Sandstone Slab let into the oak table-top, 90 cm long, 55 cm wide and 6 cm thick, upon which to set 

 large furnaces. 



2 Plate Glass Slabs (which can be lowered), mounted, 1 m wide, 75 cm high, for protecting the audi- 

 ence when explosions occur. 



2 Lead Slabs in front of the explosion slabs. 1.13 m long, 65 cm wide and 3 mm thick. 



2 Clay Pipes, 15 cm internal width, each being placed 1.70 m from the middle of the table on either 

 side. These are carried under the floor to two flues in the back wall: they are broaden out at the upper 

 part of the table, so that the diameter at the table top is 22 cm. 1 cm below the top is a perfo- 

 rated slate slab upon which vessels may be placed. The apparatus allows of convenient ventilation 

 from the lecture table. When not in use the pipes are closed by wood lids. 



6 Small Lead Pipes, 3 cm wide, regularly distributed over the table, for the same purpose as the clay 

 pipes and especially for carrying off gases from hose leads. 



2 Movable dips for supporting compressed gas bombs. 



12 Water Wastes (of lead piping), which rest on the front wall of the table and terminate in an open 

 channel underneath. 



Leads for Water, Gas and Electricity at the back of the table under the top, the latter having 

 holes for the hose leads. Here are equally distributed 24 gas outlets for 1 flame. 2 for 10, and 2 for i 

 40 jets: 14 water outlets; 6 vacuum taps^ 4 electric terminals for 20 amps, and 1 for 6 amps. 



1 Aspirator (water air pump). 



1 Terminal for current of 400 amps., together with measuring instruments, for operating electric fur- 

 naces, and a terminal for 25 amps., together with rheostat, for the projector lamp, at the left-hand 

 end of the table. 



Price on 

 appli- 

 cation 



