156 BOTANICAL INFORMATION. 
omitting the figures in those spaces which correspond to 
districts within which the species had not been ascertained 
to grow, a tolerably exact notion of its topographical range 
may be instantly conveyed to the eye of a reader. Those 
botanists who are sufficiently interested in such investigations, 
may give greater precision to the diagram by colouring the 
spaces, in accordance with the details of distribution given in 
the text for each species. This course will be more especially 
requisite with the scale of altitudes ; since the mere elevation 
of the highest hill of the district cannot prove at what pec 
ticular height the species in question has been ascertained 
to grow, although it may often show that a given species 1s. 
to be found in districts including lofty bills. In each copy 
of the work, one or more of the diagrams will be so coloured, 
by way of example; but the manual labour of applying Co- 
lour to all of these, would be far too great; while the cost of 
engraving equally prevented the substitution of printed shades — : 
or markings in the diagram, the introduction of which would | 
have necessitated the cutting of a separate block for each 
of 1200 species.” 2: 
.. Indeed, nothing here is wanting that labour and industry, 
extensive travels and acute observation can furnish; and — — 
if carried out to its completion, Mr. Watson's book vill 
serve as a model (as indeed it does now, so far as it goes) for 
all other works on this interesting subject. 
SALICTUM Brirannicum ExsiccatuM; containing dried z : 
Specimens of the British WinLows, edited by the REV. E 
J. E. Leere, M.A. Fase. 1, folio, Saffron Walden, 1842. — 
In the first volume of this Journal, (p. 418), we announced — — 
that Mr. Leefe had in preparation a series of specimens of - 
British Willows, of which the present is the first fasciculus. - 
The author, in his introductory remarks, modestly alludes 
to the above notice, as “indicating more extended objects 
