70 
DR. YELLOLY’S REMARKS ON THE 
well known, that no one deposit is strictly and unequivocally unmixed ; but is 
blended, in various proportions, with others, so as to undergo, by this means, 
more or less modification of character and appearance. 
Calculi consisting principally of one deposit. 
Lithic acid 81 
Lithate of ammonia 20 
Oxalate of lime 20 
Phosphate of lime 4 
Fusible calculus, or mixed phosphates ; that is to say, calculi com- 
posed of the triple, or ammoniaco-magnesian phosphate, united 
with phosphate of lime 37 
Calculi consisting of two deposits. 
Lithic acid and lithate of ammonia 37 
oxalate of lime 11 
mixed phosphates 10 
phosphate of lime 2 
Lithate of ammonia and lithic acid 2 
oxalate of lime 25 
mixed phosphates 14 
phosphate of lime 1 
Oxalate of lime and lithic acid 10 
lithate of ammonia 1 
mixed phosphates 15 
phosphate of lime 3 
Mixed phosphates and phosphate of lime 2 
Calculi consisting of three deposits. 
Lithic acid, phosphate of lime, and mixed phosphates 2 
oxalate of lime, and phosphate of lime 1 
oxalate of lime, and lithate of ammonia 2 
oxalate of lime, and lithic acid 4 
lithate of ammonia, and oxalate of lime 2 
