of JBoracic Acid, ^-c. 367 



IV. Bicarbonate of Ammonia. 



Primary form, a right rhombic prism. 



MM^ = in°.48' 

 PM = 90 



(Fig. 6.) 



Cleavage, parallel to M and M^ ; very perfect. 



The crystals were deposited from a saturated solution in 

 a close vessel. 



W. H. MILLER. 



St. John's College, 

 Nov. 30, 1829. 



