AQUARIUM CONSTRUCTION 



213 



Frame Construction. A hack-saw with fine teeth for metal-work- 

 ing- will be needed to cut the proper lengths of angle metal. After 

 carefully determining proportions desired, cut the four uprights and 

 then the material for top and bottom frames. If working in brass, 

 the latter should each be left in one piece. By accurately beveling 

 the two ends and preparing right-angle cuts at three points, as shown 



Fig. 199. Cut, Preparatory to Bending Angle Brass 



in above figure, the whole can be bent into a frame that will pro- 

 duce very neat corners and make soldering easy. The right-angle 

 cuts should be finished with a square file and carried within about 

 1/32-inch of going through. This leaves the bar very weak at these 

 points and considerable care is necessary in handling in order that 

 some accident does not break them apart before it is time to bend. 

 If one breaks it is not a very serious matter, only the corner will not 

 have quite such a neat appearance. In practice we find it best to bend 

 each cut as soon as finished and roughly fasten with solder. When 

 all three bends have been completed, place within it a wooden form, 

 as shown below. Except for the corners being cut off (to allow for 



Fig. 200. Frame Secured on Wooden Form 

 Note Reinforcement in Upper Right Corner 



soldering), the edges of form should be perfectly rectangular and fit 

 closely. Now secure quite firmly with stout twine. After all cor- 

 ners are trued up with the board, apply the permanent solder. Melt 



