1895.] MICROSCOPICAL JOURNAL. 131 



3. (b) Spores and Spore Collects. — These are whitish 

 globular or irregularly globular bodies varying in size 

 but on an average of 1-12,000 inch in diameter that 

 occur single, double, triple and so on to aggregations of 

 hundreds and thousands into large oval masses, which by 

 the action of the blood stream are rolled generally into 

 flattened oval or bluntly fusiform bodies, looking like 

 snow among the red discs. In bad cases these spore 

 collects appear in amueba-like shapes almost filling the 

 whole field ! 



These spores are still, non-mobile. They appear white 

 like snow while in focus. Out of focus they are a light 

 green grayish color. They are present in largest num- 

 ber immediately on their withdrawal from the blood 

 stream and many of them disappear in the course of ten 

 minutes. This speedy dispersion makes it necessary to 

 have the patient and microscope present together and 

 hence the usefulness of clinical microscopes furnished 

 with the best objective and illumination by direct light. 

 The writer uses a common candle. It has proved suffi- 

 cient for the l-50th inch objective of Tolles, 178° angu- 

 lar aperture. Those who have a draw tube with society 

 screw, by the invention of Dr. Eugene ShurtlefF of Bos- 

 ton, can use their own objectives as clinical microscopes 

 at the cost of a few dollars. Mr. Albert Storer of Bos- 

 ton provides with the Shurtleff stage a loop clamp of 

 piano forte wire which is the best thing I have seen for 

 holding slides on a clinical stage. 



There are other morphological elements in tubercu- 

 lous blood, but for our purpose the above are sufficiently 

 diagnostic in cases suspected of tuberculosis. The above 

 vegetations in the blood of tuberculosis are, in the opin- 

 ion of the discoverer and others, myself included, the my- 

 coderma aceti or vinegar yeast in baby or micrococcus 

 stage. The aerial mycelial adult forms do not grow in 

 the blood. 



