( 328 ) 
In June, 1811, the garden was leased by the College of 
Physicians and Surgeons for five years to Michael Denison, 
Dr. Hosack’s former gardener, whereby he agreed to keep 
it in good condition (after certain repairs by the College, 
costing $543.98) in consideration of his having the produce 
of it, reserving for the garden, under the College inspection, 
three plants of every species.* The buildings and the culti- 
vation of herbaceous plants, as I surmise from the subsequent 
leases, were confined to the northeast part of the garden 
grounds, 7. ¢., north of 49th Street, and extending not over 
450 feet westward from Fifth Avenue, the rest being used 
for shrubs, trees, nursery, crops and pasturage. The con- 
servatories were between 50th and 51st Streets. 
In 1811, the College of Physicians and Surgeons was re- 
organized by the Regents under a new charter. Dr. Hosack 
was called to the chair of materia medica and clinical medi- 
cine, and was largely instrumental in bringing about the 
union of the medical department of Columbia with the 
Physicians’ College, which was completed in 1813-14. Dr. 
Mitchill was professor of natural history including botany. 
During the five years of Denison’s tenancy, the College of 
Physicians and Surgeons had all the use of the garden that 
was desired. Dr. Mitchill ‘* availed himself of its advan- 
tages.” t In1812 Dr. Hosack gave the lectures on Botany, 
‘‘and the State Botanical Garden,” it was said, ‘‘ gave the 
most ample opportunity for study.” § In the Syllabus of 
Courses for 1814, it is said (p. 19) 
‘* For practical lessons on genera and species, the grand 
establishment of Elgin . . . is visited as often as neces- 
sary.” | 
Differences, however, soon arose as respects the care and 
repair of the garden. Dr. Hosack reported in 1813 that re- 
pairs were much needed to fences, roads, cisterns, flues and 
“"* Dalton’s Hist. Col. Phys. and §S., 46. 1888. Trustees’ Min., June, 
811: 18, 35. 
{ Hist. Col. Phys. and S., 39, 4o. 
t Ibid, 46. 
jae: Med. & Phil. Reg., 3: 242. 
| See Regents’ Rep., 1814: 19. 
