572 PROCEEDINGS OF THE ACADEMY OF [1893. 
REPORT OF THE PROFESSOR OF HISTOLOGY AND 
MICROSCOPIC TECHNOLOGY. 
I beg to report that the work done as Professor of Histology 
and Microscopic Technology during the year 1893 has embraced 
the study of the life history of the tubercle bacillus, the thera¬ 
peutic effect of its products, the life history of Actinomyces with par¬ 
ticular attention to . the morphological changes produced by dif¬ 
ferent food stuffs, a careful study of the blood from four cases of 
Beri-Beri and microscopic work on slides of the bacillus of leprosy 
which I prepared directly from lepers. Verbal communications have 
been made to the Academy on Actinomyces and Beri-Beri. 
Respectfully, 
Samuel G. Dixon. 
Prof, oj Hist, and Microscopic Technology. 
REPORT OF THE CURATOR OF THE WM. S. VAUX 
COLLECTIONS. 
The Curator of the William S. Vaux Collections respectfully re¬ 
ports that they are in good condition. Since the last re¬ 
port, made to the Academy in 1890, 134 specimens have been added 
to the cabinet of minerals at a cost of $645.05. A number of these 
are unusually fine specimens of rare species. 
Since the death of the late Curator, Mr. Jacob Binder, I have 
added to the mineral collection from Nov. 2, 1892 to the present 
date Dec. 15, 291 specimens at a cost of $1,411.75. 
The number of specimens in the collection as reported by Mr. 
Binder Nov. 30, 1890 was 7,028. He afterwards added 134 to Aug. 
13, 1892 and since that time I have added 291, making a total of 
7,450. 
No additions have been made to the archeological collection since 
1885 and the number of specimens remains the same as then reported, 
2,940. 
Respectfully submitted by 
Wm. H. Jefferis, 
Curator. 
