30 



All these houses were of the same width, angle of roof, etc. 

 except No. 4, already mentioned. Some of them were too heavily 

 framed, but Nos. 7 and 8 were good, modern houses, kept clean, 

 and the owner is one of the most successful cucumber growers in 

 the state. The single and double glass houses gave the poorest 

 results from the light standpoint, and the newer houses proved 

 superior in this respect. 



The following tests were made in some of the greenhouses lo- 

 cated on the College grounds. 



Table XIII showing records based on 4 experiments taken in 

 some of the college greenhouses. Observations taken from 9.30 

 — 11.30 a. m. and from 1.30 — 4.00 p. m., in July and August. 

 Outside light conditions in open air equal 100%. 



House. 



Direction of 

 House. 



Approxi- 

 mate Age. 



Angle of 

 Roof. 



Percentage 



of light 

 excluded. 



Entomology 



Clark Hall 



French Hall, Rose 

 house 



Durfee upper house 



Exp. Station, veg. 

 house 



Exp. Station, south 

 house 



Durfee lower house 



North and south 

 East and west . 



East and west . . 

 North and south 



North and south 



East and west . . 



12 y-s. 

 3 yrs. 



3 yrs. 

 17 yrs. 



12 yrs. 



14 yrs. 

 17 yrs. 



31 o 



34 « 

 18^ 



16^ 



,30" 

 20 c 



16.2 

 18.5 



23.9 



28.8 



30.6 



S2.6 

 34.0 



These houses represent a variety of types of construction and 

 were built at different periods, therefore it was to be expected 

 that the light conditions would vary. The data given here repre- 

 sent an average of four tests m.ade in the morning and afternoon, in 

 July and August, the houses being arranged in the table according 

 to the amount of light excluded. The sequence, however, does not 

 follow exactly that given above, when the morning averages are 

 compared with those of the afternoon. This difference is account- 

 ed for by slight differences in the morning and afternoon exposures 

 and methods of construction. The ages of the houses varied, and 

 some of them have been remodelled at different times. It will be 

 noticed, however, that the houses showing the best light conditions 

 are as a rule the ones most recently constructed. French and. Clark 

 Hall conservatories were both built in 1908. The latter, — a 

 Stearns wood frame construction, is glazed throughout with 24 x 24 



