262 Practual Paper-Making. 
accepted, and it was decided that these instructions should 
not be published in the transactions, until after our own 
manufacturers should have an opportunity of reaping the 
advantages of the new process, and the inventorsshould judge 
that it had been carried to perfection by practice. 
The hopes of this society were disappointed, and the in- 
terest it had taken in the advancement of our manufactures 
was not appreciated. Notwithstanding the engagements, 
taken by all, only three manufacturers fulfilled their pro- 
mise. M. Eli Montgolfier acknowledged the receipt of the 
communication, and announced that he had tried the ex- 
periment and found the result satisfactory; but that the 
process seemed to him more expensive than the one he was 
accustomed to employ, and, therefore, would be difficult to 
adopt. 
At the Exhibition of 1819 there appeared paper from the 
mills of MM. Odent and Grevenich, who had each sepa- 
rately taken the same engagement as M. Eli Montgolfier, 
in receiving the instructions. The first was the only one who 
acknowledged the receipt, or rendered an account of his ex- 
periments. For some time, the paper furnished by him to 
the Administration of Letteries was sized in the new way ; 
but, as he only worked with fermented pulp, his paper was 
too soft, and the Administration obliged him to size with 
gelatine. 
M. Canson, to whom the same process was communi- 
cated, endeavoured to modify it, and took out a patent 
to insure himself a monopoly of the method he employs, at 
his beautiful paper mills at Vidalon les Annonay. This pro- 
cess is, at the present day, well known to all, and we will 
speak of it further on. 
We should probably have been longer in being able to 
fix upon the substances suited to sizing in the pulp, had 
not chance thrown into the hands of M. Braconnot, in Sep- 
tember 1826, a leaf of paper made in the department of 
Tosgos and sized in the pulp. This learned chemist ana- 
lyzed this leaf, and from his analysis deduced the following 
process for forming a size to be mixed in the vat, in order 
to size the pulp as soon as manufactured. This analysis i iS 
described in the 33rd volume of the Azuales de Chimie et 
de Phisique, page 39. 
“To a hundred parts of dry pulp, properly diluent with 
water, add a boiling and perfectly homogeneous solution of 
eight parts of flour, first mixed with a small amount of 
caustic potassa, to render the solution more perfect. aie 
