HORTICULTTJEE. 235 



acid gas appears to be especially injurious to tender plant tissues when they are 

 wet. 



In the work with the hibiscus, V. S. Holt in charge, a large number of new 

 varieties have been originated and are under observation. Over 25,000 cut- 

 tings have been distributed. Ruth Wilcox, one of the most attractive sorts, is 

 here illustrated and is said to be one of the few hibiscuses which emit a delicate 

 perfume. 



The work in the citrus orchards consisted principally in observations of varie- 

 ties coming into bearing. Cultural tests of Bermuda onions conducted at the 

 Homestead substation and in several other parts of the island of Kauai indicate 

 that first-class marketable onions may be grown in the sandy and loamy soils. 

 "When grown in the heavy clay soils, on the other hand, a serious disease was 

 prevalent, which appeared to be identical with the bacterial disease of this crop, 

 known as " center rot " or " slippery onions," previously reported at the New 

 York State and Georgia stations (E. S. R., 12, p. 55; 13, p. 53). 



Horticultural work at the Canadian experiment stations and farms in 

 1912, .7. H. Grisdale, W. T. Macoun, F. T. Shutt, et al. {Canada Expt. Farms 

 Rpts. 1912, pp. 9-12, 18-23, 81-111, 157-164, 260-268, 27^-279, 801-305, 328-333, 346, 

 31,7, 355, 356, 384, 385, Jf01-J,08, 418-422, pis. 2).— This is the customary progress 

 report on breeding, cultural, and varietal experiments with fruits, vegetables, 

 ornamental trees and shrubs, etc., being conducted, at the Central Farm, Ottawa, 

 and the various branch experiment stations and fanns in Canada (E. S. R., 27, 

 p. 343). 



Full descriptions are given of tlie most promising seedling fruits received for 

 examination at the Centi-al Farm during the year, and of 19 additional named 

 varieties of apples originated at the farm. A survey of the Mcintosh seedlings 

 shows them to be especially promising since they have inherited to a large 

 degree the good qualities of the Mcintosh. Descriptions are given of 3 new 

 seedling plums, together with 4 of Hansen's hybrid plums which are being 

 tested. 



Extensive variety tests of tomatoes under glass were started during the 

 year and the results of the first season are presented in tabular form. In the 

 work with ornamentals considerable attention has been paid to roses, with 

 special reference to hybrid tea roses suitable for growing in Canada. Sugges- 

 tions are given on the culture of hardy roses, together with a list of the best 

 varieties of various types, including data on hybrid roses tested at Ottawa. 

 Analyses of lime-sulphur washes and various insecticides are reported. 



The work at the branch experiment stations and farms has thus far largely 

 consisted of adaptability tests of different varieties of fruits, vegetables, orna- 

 mentals, etc. A new commercial apple orchard was established at the experi- 

 mental farm in Nova Scotia. Cost data are here given of the first year's 

 operations and are to be followed by similar data from year to year. 



Report of the assistant horticulturist, C. J. Hunn {Hawaii Sta. Rpt. 1912, 

 pp. 45-50, pi. 1, fig. 1). — A brief survey of horticultural operations for the year 

 including orchard plantings, spraying, mapping, plant accessions and distribu- 

 tions, record making, etc., together with a descriptive account of a new insect- 

 proof glass house and other new horticultural buildings and equipment. 



Report of the horticultural testing' fields from 1907 to 1911, R. P. Bon- 

 THuis {Verslag. en Meded. Dir. LamU). Dept. Landb., Nijv. en Handel, 1913, 

 No. 1, pp. 1-76). — This comprises a report on various exi^erimental tests with 

 fruits and vegetables conducted under the direction of the Netherlands Govern- 

 ment during the period 1907 to 1911. They include fertilizer, variety, cultural, 

 income, spraying, and pollination experiments. 



