70 The Microscope. 



Cc N Ho O4 S2 (Grolding Bird). — A crystalline substance found 

 in the human body. It is the most common form of gravel found 

 in rheumatic blood. Of course, in the blood stream the crystals 

 are subject to friction and cannot be expected to have the exact 

 angles of the form found on the skin or in the still fluid of the 

 urine. In Fig. 3, Plate 1, one was greenish inside and pur- 

 plish outside ; three were straw color ; four ultramarine, 5-10 

 greenish white. These were abundantly found in the blood of 

 an adult man who suffered from acute sciatica. There were also 

 found long skeins of fibrin filaments, strong fibrin network, red 

 blood corpuscles, rather palish in color, sticky, and settling into 

 ridges and huddled masses. Under a course of hot water drinks 

 flavored with lemon juice, and with ammonia baths along with 

 alterative medicines, he was soon relieved of the sciatica, and 

 his blood was found to be cleared of the cystine. 



Oxalic rheumatism. — Oxalate of lime occurs in the blood in 

 amorphous granular masses. The urine is usually loaded with 

 well formed octahedral crystals, and may be milky in the granu- 

 lar oxalate of lime. They occur also in the faeces and expec- 

 toration (" gravel of the lungs.") Sometimes cystine is associ- 

 ated ; sometimes other crystalline masses, crushed and frac- 

 tured, are also found. Sometimes the oxalate of lime fills, 

 more or less completely in crystals, a thrombus like plums in a 

 pudding. 



Lithic rheumatism. — Uric acid and urates are found in the 

 blood in granular amorphous forms, rarely crystalline. Also in 

 the urine, on the skin, in the faeces, saliva and sputum. Blood 

 ^opy? ^i^gy? adhesive. Emboli made up of fibrin and other 

 formed elements of the blood. 



Phosphatic rheumatism. — Here the triple phosphates and the 

 phosphates of the alkaline earths are found in the blood in gran- 

 ular masses and crystals. Found in great rounded collections 

 which sometimes are beautifully colored an aniline blue of great 

 purity. To make the diagnosis sure they should be found also 

 in the skin or the urine and sputum. As the blood stands longer 

 and longer on the slide and under the cover glass, these crystal- 

 line forms remain visible with even better defined outlines than 

 at first. So do cystine and oxalate of lime. The granules are 

 not uniform in size. 



