76 On the Condition of the Blood 
MICROSCOPIC EXAMINATION OF THE BLOOD. 
I was at once struck with its resemblance to the blood 
of the man I had seen the day before at the hospital, and 
now with my own instrument and appliances I spent the 
whole of two days (it being holiday time) examining this 
blood. What I hastily took for white corpuscles at the 
hospital with a strange instrument and no conveniences for 
quiet observation, turned out to be nucleated cells of a 
perfectly circular form, with a diameter on the average of 
iy inch. The nucleus nearly round, x inch broad. 
Besides this I detected on the second day, after applying 
magenta, a minute spot at some part of the circumference of 
the cell. This remarkable spot, when once seen, was dis- 
tinctly visible in all. 
Puate I. 
Foreign cells seen in the blood of the dog poisoned by the venom of the 
| Cobra di Capella. 
x 400 diameters. x 1100 diameters. 
Copied from the Author's drawings, by Dr. Neild. 
Of these cells there must have been many millions ; they 
were present in the blood of every part of the body, but in 
much greater quantity in the dark congested parts of the 
lungs. None, however, were detected in the fluid of the 
thoracic duct. 
