23 
».96 Pollen and propolis. Composition, characters, "substitutes 
and uses. 
».97 Bee chemistry. 
».98 Bee meteorology, Monthly reports. 
».99 Agricultural effects of bees. 
I did not give greater extension to these, tables, as those given 
seemed to me sufficient for a good classification without too 
many subdivisions. 
These tables, however, in the absence of trial, must not be 
considered free from defects: experience must give suggestions 
and I am sure that when the practical classification of the many 
articles in various periodicals is undertaken, many gaps will be 
found and therefore we shall have to make iidditions, to map out, 
render accurate and more clearly distinct the various groups into 
which our science must bo divided. Such additions and further 
elucidations must however always be effected without disturbing 
the numbering already made. 
The editors of periodicals, or those who first set themselves 
to this work, which hitherto has not been proposed for our api- 
culture branch, nor in fact for any periodical, will be the first 
to experience what is wanting and to fill up such gaps. 
Thus the various editors of periodicals having completed the 
classifying tables referring to the subject under discussion, and 
having submitted same to the Bruxelles International Bibliographic 
Institute, they can be made known to the whole world, as was 
Melvil Dewey's idea, so that already as staled, with an ordinary 
catalogue, any diligent student can and should be able to obtain 
all reqtiisite knowledge and at the same time, make known the 
intellectual productions of his own and other countries. 
Genoa, 3i March 1902. 
^^^£^ 
