Dr. Hare on the Theories of Electrical Phenomena. 45 
of soft soaking-paper, and put under pressure, and in most cases 
the specimen in drying adheres to the paper on which it is laid 
out. Care must be taken to prevent the blotting-paper sticking 
to the ites poe and destroying them. Frequent changes of 
drying-paper (once in six hou urs), and cotton rags laid over the 
specimens, are the best preservatives. The collector should have 
at hand four or five dozen pieces of unglazed thin calico [white 
muslin] (such as costs five or six cents a yard), each piece about 
eighteen inches long and twelve wide, one of which, with two or 
three sheets of paper, should be laid over every sheet ‘of specimens 
as it is put in the press. These cloths are only required in the first 
two or three changes of drying-papers, for, once the specimen 
has begun to dry; it will adhere to the paper on which it bags en 
floated, in preference to the blotting: paper laid over it. 10uld- 
it perversely adhere to the calico, it is better not to attempt to ee 
tach it till it is nearly dry, when by a little care it may generally 
_ got free. Algz do not take so long to dry as other plants, 
many, in warm weather, will be found to be sufficiently dried 
after f forty-eight hours, if the papers have been changed three or 
our t 
“ Corallines, and Sponges, require no trouble when once col- 
lected ; it is ‘merely necessary to dry them anc a pack 
them among the rough-dried sea-wee box much 
interest attaches to these productions, and as laa of i a and 
sub-tropical countries are still very imperfectly known to 
lists, collectors of algee are earnestly requested to secure them 
whenever they present themselves.” 
+ 
Arr. V.—Objections to the Theories severally of Franklin, 
Dufay and Ampére, with an Effort to Explain Electrical 
Phenomena by Statical or Undulatory Polarization ; by Ros- 
ERT Hare, M.D., Emeritus Professor of Chemistry in the Uni- 
versity of Pennsylvania. 
(Continued from ii Ser., vol. v, p. 351.) 
= by which the Ethereo-ponderable Atoms within a Gal- 
nic Circuit are polarized by the Chemical Reaction. 
58. In order that an ethereo-ponderable particle of oxygen in 
any aqueous solution shall unite with an ethereo-ponderable par- 
ticle of zine in a galvanic pair, there must be a partial revolution 
of the whole row of ethereo-ponderable zinc atoms, with which 
the atom assailed is catenated by the attractions between dissimi- 
lar poles. Moreover, at the same time that the metallic atoms 
are thus affected, the atoms of water between the metallic sur- 
