62 ODOROGRAPHIA. 
The patent of Naudin and Schneider certainly exhibits points of 
similarity to that of Massignon and Vincent, but a glance at the. 
illustration accompanying the abstract of the specification of the 
former, given in the ‘ Pharmaceutical Journal’ [3] xiv. p. 44, 
suffices to show that with such complicated apparatus difficulty 
might be experienced in working off several tons of flowers daily 
if any part of it got out of order. The consequences of the least 
derangement in harvest-time, when perishable flowers are brought 
in quantity, would be serious. 
Another patent for extracting perfumes by means of a solvent 
was taken out in London in 1890 * by the “ Société Anonyme des 
Parfums Naturels de Cannes.” The solvent employed, by preference, 
is stated to be a light petroleum boiling at about 80° C., the flowers 
being washed in a succession of ‘ extractors” called ‘ batteries.” 
The specification of this patent is an elaborate study, consisting of 
ten pages of letterpress describing its intricacies, crowded with 
letters and numbered letters which are expected to be explanatory of 
twenty-eight figures illustrating the machinery, which is composed 
of a formidable array of batteries, extractors, boilers, gasometers, 
yacuum-pumps, purifiers, evaporators, reservoirs for compressed 
gas, gauges, purging-pipes, automatic valves, cocks and working 
cocks, and other things; to understand the technique of which 
would require workmen educated up to it. A comprehensive 
abstract of this patent might entice the reader on to the verge of 
insanity, so, as the specification is procurable at the London Patent 
Office for the modest sum of fifteen pence, the reader can purchase 
it and read it for himself on his own responsibility. 
Whatever may be the merits or demerits of all these im- 
provements and patents, it is stated by one of the largest firms of 
perfume manufacturers at Grasse, in answer to an enquiry for in- 
formation about them, that, after having made trials of various 
pneumatic processes and solvent processes, they have been aban- 
doned as not giving satisfactory results; and the old method of 
“ enfleurage-sur-chassis ” is always returned to after such trials, 
This statement, made in August 1891, does not say much for the 
value in actual work in a wholesale way of the various patented 
processes, however effectual they may be in working on small 
quantities of flower. 
* No, 5940. 
