Leucine and tyrosine: sediment from acute yellow atrophy of the liver, sheaves of tyrosine needles, and the drop-like forms of leucine, with small double spheres of ammonium urate.

PLATE IV.-B.

The sediment of alkaline fermentation: the coffin-lid triple phosphates; the brown double spheres of ammonium urate, and the amorphous tribasic calcium phosphates mixed with bacteria.

A

B

1. Hæmin, or chloride of hæmatin, obtained by adding a grain of salt to the residue of a drop of urine evaporated on an object-glass, and then allowing a drop of acetic acid to flow under the cover.-2. Blood-corpuscles of various forms, and a blood-cylinder.

PLATE V.-B.

Urate of sodium, the amorphous precipitate (sedimentum lateritium); also, the crystals of calcium oxalate and uric acid, together with fermentation fungi, which make up the sediment of a febrile urine.

1. Cystine: the powder of a cystine stone dissolved in ammonia, and evaporated on an object-glass; hexagonal plates, colorless.-2. Gonorrhoeal thread, the catar rhal secretion from the accessory glands of the urethra.-3. Spermatozoa.

PLATE VI.-B.

Calcium carbonate, seldom found; sediment of an alkaline urine, spheres, dumb-bells, and granular precipitate, found usually in connection with the earthy phosphates.