227 
been found that worn out soils may be fertilized at much lower 
cost than by other artificial means. 
As noted in the Journar for June an area of about half an 
acre of land at the rear of the museum building was graded and 
prepared for sowing crimson clover seed in April and May. The 
area was one that had to be denuded in the general grading op- 
erations around the building and a great deal of rock taken out 
of it, and it was subsequently covered to an average depth of 
about 10 inches with top-soil hauled from other parts of the 
grounds, affording excellent opportunity for the use of crimson 
clover instead of manure for fertilizing. The record of growth 
is as follows: 
May 14, seed sown and the ground rolled. 
May 20, first appearance of seed-leaves above ground. 
May 30, first simple foliage leaves abundant. 
June 2, tubercles on main roots nearly 1 mm. in diameter ; 
minute tubercles on secondary roots. 
June 15, plants about 2 inches high; increase in tubercles on 
the root system. 
July 1, crop averaging 6 inches high, with proportionate in- 
crease of tubercles on the root system 
The continued and severe drought through June and July 
greatly retarded growth, so that not more than about one third 
the full crop was obtained. A small proportion of the plants 
came into bloom late in July. 
August 7, the crop was plowed in.. 
September 9, area sown with lawn mixture. 
December 1, area well covered with young grass. 
EXPENDITURES IN May, 
Plowing, team and 2 men, one day $7.00 
aie a and ee ‘eae and 1 man, } day......scsecsees 1.25 
Sowing, 1 man, 3 day +40 
Cost of crimson clove seed 72 
EXPENDITURES IN AUGUST. 
Plowing, team and 2 men, § day..... sseccese cersseererrettrees 5.25 
EXPENDITURES IN SEPTEMBER. 
Cost of lawn grass see 
Harrowing, sowing and rollin: 
Total expenses for half an acre ....seseseseversesesseceeeeers 
