THA: ORGAO REVIEW. 
VoL. XV.] MAY, 1907. [No. 173. 
THE HYBRIDISATION CONFERENCE REPORT. 
THE Report of the last Hybridisation Conference, or, to give it its official 
title, Report of the Third International Conference (1906) on Genetics, 
edited by. the Rev. W. Wilks, M.A., has just appeared, and will be warmly 
welcomed. It is pretty similar in bulk to an issue of the R.H.S. Journal, 
- and contains 486 pages, with 131 figures, and an Index. A photograph of 
Gregor Johann Mendel, whose work has of late received such attention, forms 
the frontispiece. We may summarise the papers which will be of most 
interest to our readers. 
‘The first twenty-eight pages are devoted to a reproduction of the 
% “original programme of the Conference, with a list of the invited guests, and 
- includes even a reproduction of the tickets, arrangements for the several 
ons, and other matters, which it is thought may have some historical 
interest, and will help to recall to many the details of an eventful and very 
enjoyable week. Then come the reports of the conversazione and exhibits, 
the | dinner given by the Horticultural Club, the visit to Burford, the Society’s 
banquet, and the visits to Gunnersbury and Kew, this being interspersed 
with numerous portraits. 
The Report of the Conference proper is prefaced by a short account of 
Mendel and his work, with two portraits and a facsimile letter, which he 
wrote to Nageli, and here we should have liked to see a summary of the 
following papers, which are difficult to find, for in the Index the subject of 
each address is not stated. This is probably accidental, but is rather an 
unfortunate omission. 
Orchids are first definitely introduced in a paper on ‘“ Mendelian 
characters in Plants and Animals,” by C. C. Hurst, F.L.S., F.R.H.S., a 
short note being given, accompanied by photographs of thirty forms of 
Paphiopedilum x Hera (see O.R. xi. pp. 71-73, fig. 16-18). Mr. Hurst 
alludes to three pairs of Mendelian characters, viz., purple sap colour and 
albino, spotted sap and striped sap patterns, and white and green areas, 
the first named of the pair being considered dominant over the other 
Many other characters in Orchids, both pigmental and structural, he con- 
