NOTICES TO MEMBERS 
99 
PROFESSIONAL ADVERTISEMENTS 
A limifed number of relevant advertisements will be accepted either 
for the Year Booh or for Watsonia, or for both, as space permits. En- 
quiries should be addressed to Mr. R. A. Graham, Mint House, Wood- 
side Road, Northwood, Middlesex. 
BINDING CASES FOR WATSO:SIA 
Arrangements are being made for the issue of a standard binding 
case for the first volume of Watsonia and details will be advei^tised as 
soon as possible. In the meanwhile members are advised not to have 
their i)arts bound privately if the official case is likely to be of use to 
them. 
EXHIBITION MEETING, 1951 
This has been arranged for Saturday, October 20th, at the British 
Museum (Natural History) by kind permission of the Trustees. More 
space will be available for exhibits than in previous years and members 
are invited to bear this in mind during the summer with a view to 
illustrating particular subjects. A notice giving full details of the 
meeting, and the address to which offers of exhibits should be sent, will 
be sent out in the autumn. 
CONFERENCE, 1952 
A Conference under the title of The Changing Flora of Britain is 
being arranged for Friday and Saturday, April 4th and 5th, 1952, in 
the Lecture Room, Royal Horticultural Society’s New Hall, Greycoat 
Street, S.W.l. During the Conference there will be a session set aside 
for a special exhibition. Exhibits must be strictly relevant to the sub- 
ject of the Conference and offers may be sent to Dr. J. G. Dony, 41 
Somerset Avenue, Luton, Beds. A number of well known botanists 
have already undertaken to read papers and a separate notice will be 
sent out early in 1952. 
INTERNATIONAL COMMISSION FOtl PLANT SLIDE 
EXCHANGES 
Societies and individuals may become mefnbers of the Commission. 
Membeis aie expected to collect and send material for slide-making 
purposes, for which they may obtain slides in exchange. 
Particulars may be obtained from the Assistant Secretary, or from 
Di . D. A. Johansen, 861 East Columbia Avenue, Pomona, California 
U.S.A. 
LIST OF county FLORAS IN PREPARATION 
Twenty-four new County Floras are at present being prepared, some 
of which are revisions of previous editions, while others deal with 
counties or vice-counties that have not previously been covered. The 
