222 NEW JERSEY AGRICULTURAL COLLEGE 



offspring- under the particular environment of the breeding 

 grounds has become more and more imperati\e as the work in 

 inheritance is centered upon particular factors of the plants. 

 Some stress has been placed upon the effect of fertilization ( i ) 

 within the flower, (2) within the plant, (3) within the variety, 

 and (4) within plants of the same cross. Attention has been 

 paid to the consideration of the form of the young as compared 

 with the fully grown parts in stem, leaf and fruit, noting the 

 stages that the parts pass through in attaining maturity. 



2. Plant Toxicolocv. — The investigations with poisons 

 have not, generally speaking, passed beyond the initial 

 stage save in the case of that of the Bordeaux Mix- 

 ture as influencing the health of jjeach leaves where 

 results have been issued during the year in bulletin form.* 

 An experiment with various plants involving forty-eight two 

 gallon crocks filled with sand and carrying pure chemicals in 

 definite amounts, is now in progress. Many other potted plants 

 are being treated with various substances, ix)ssibly poisonous to 

 plants, — some of them being colored li(|uids as fuchsin and 

 eosine, — from which, jxiints in the movements of toxic liquids 

 are in sight. 



3. Pl.wt Sap Circulation. — Somewhat closely related to 

 the last subject is one that has been carried on with the sweet 

 ]x>tato, a statement of the progress of which was made in the 

 last annual rc|>ort. and the conclusion of the same is given else- 

 where in this N'olume. 



4. Plant Shading. — .\ study has been begun of plants of 

 several kinds in shade as compared with controls in the open 

 greenhouse. In other words, a portion of the plants under 

 glass were covered by a tent, thus furnishing controlled con- 

 ditions for shade and for sun. Substantial progress under this 

 head is shown elsewhere in this report. 



Exr'KRIMKNTS WITH CoRN. 



Owing to unusual pressure for land to meet the needs of other 

 experiments, the size of the blocks was much reduced and un- 

 fortunately the prolonged drought came at the time when the 

 ears were l^eginning to form and results for this season are in 

 many instances very meager. There were twenty-four blocks, 

 nine upon the Home Grounds and fifteen upon the North Lot and 

 Strips; up)on the latter the soil is still poor and the crop nearly 

 failed. 



•"Contribution to the Study of Bordeaux Injury on Peaches," Bulletin No. 232. 

 pp. 20, plates 2, by Dr. B. H. A. Groth. 



