28 THE DESIGN AND NEW CONSTRUCTION 



For use in connection with the work of this room — although located in 

 another room on account of lack of space — is a marbleized glass table used 

 for laying down and fairing lines. This table is 3 feet by 14 feet. 



We have also an outfit of modeler's clay which we use in working up and 

 checking unusual forms. 



This room is painted in the same way as the criticism branch and the 

 floor covering is the same. 



The lighting of this room presented some special difficulties owing to 

 the fact that, unlike the other rooms, all the work herein is draughting. 



It has been solved satisfactorily by using eleven 60-watt tungsten lamps 

 7 feet up and so located as to throw the light from the front of the board 

 instead of over the shoulder, thus avoiding shadows. 



Plate 26 shows the arrangement of this room. 



Scientific and Computing Room. — The scientific and computing room 

 contains thirteen draughtsmen at the boards engaged on all kinds of scientific 

 investigations, calculations and computations as to ships. The leading 

 draughtsman and his assistant have desks, and each of the others has a table 

 fitted out with computing and calculating instruments, etc. This table is a 

 duplicate of one-half of that in the criticism branch but without racks on top 

 and with the computing instrument rack added. There is provision in this 

 room for filing, in metal cases, the plans, calculations and records pertaining 

 to the strictly scientific end of the work, such as stability calculations, 

 estimates for projects, displacement calculations, strength calculations, 

 weights estimated and returned, etc. 



This room is lighted by twelve 100- watt tungsten lamps about 10 feet 

 above the floor. The painting is similar to the criticism branch. The floor 

 covering is the same. 



Our outfit of mechanical calculating instruments comprises : — 



Nine comptometers and i comptograph. 



Six arithmometers of various types. 



Two Fuller shde rules. 



Two integrators. 



Five planimeters of various types. 



Sexton's omnimeters are supplied to most of the draughtsmen in the 

 Bureau. 



Plate 27 shows the arrangement of this room. 



The Blue Print Room. — This is in two parts — one in the Bureau and the 

 other at the Navy Yard. Originally all blue prints were made in the Bureau 

 but the number increased so that our facilities for making them were inade- 

 quate and our room for expansion was insufficient. Accordingly the old blue 



