116 



THE GARDENERS' CHRONICLE OF AMERICA. 



if a combination of two forms could be secured, it would published some important work in the improvement of 

 approximate what was wanted in the way of an ideal the violet through definite selection ettort. In connection 

 lettuce for culture under glass. Mr. Oliver made this with this work and directly as an outcome of it developed 



CARN.ATIOX CULTURE. TESTING OF NEW' \'.\RIETIES .XNP ROSE CULTURE. TESTING OF NEW \'.\RIETIES .\ND BREEDING 



BREEDING WORK. WORK. 



BREEDING WORK IX THE IMPROVEMENT OF GRASSES. 



BREEDING WORK IN THE IMPROVEMENT OF COWPEAS. 



ONE OF THE PLANT HOSPITALS CONNECTED WITH THE 

 BURE.\U OF PLANT INDUSTRY. 



cross and after a few years' selection the cross was defi- 

 nitely fixed. 



Later the work led into the field of violet culture, which 

 was continued for five or six years and which resulted in 

 clearing up and publishing an account of some of the 

 most troublesome diseases of the violet, which hitherto 

 had remained more or less of a mvsterv. There was also 



PORTION OF HOUSE DEVOTED TO CULTURAL WORK ON DRY- 

 LAND ORNAMENTALS. 



the practice of using cyanide gas under glass. Cyanide 

 gas had been used out of doors, more especially in Cali- 

 fornia, but had not been applied to plants under glass ex- 

 cept in a limited way. Experiments were made with a 

 few violet plants at first and gradually the scope of the 

 work widened until entire houses were successfully 

 fumigated. 



