117 
Royal Microscopical Society. 
Acid urates therefore assume shapes indicating that their form and 
polarities revert towards uric aoid. In particular where uric acid is 
used in large excess of soda or ammonia the crystals deposited from 
watery solutions are always navicular plates of great beauty and 
delicacy, and sometimes of great size, making the fluid in which 
they are suspended sparkle with bright flakes. 
