19% Flail-Rod. 
and discoveries in botany, horticultare, and all branches of 
natural philosophy, by transmitting a copy of their works, 
memoirs, or essays on those subjects, to be deposited in the 
general collection at Paris: also specimens or drawings of 
exotic or rare plants, seeds, and such productions as deserve 
the attention of the learned. 2dly, by subscribing to the 
Linnzan Transactions or Annals, which are yearly published. 
This injunction is obligatory on all national members, but as 
the foreign members have a right to all materials of instrac- 
tion, itis expected they willingeneral secure it by subscrip- 
tion. 
Art. 1V. The Lianean Society of Paris annually pre- 
sent for the use of each section, the yearly reports of the 
perpetual Secretary, and a copy of all internal transactions or 
the annals, and other scientific works as are distributed by 
ihe authors, with the printed narrative of the general meet- 
ings and festivals. In proper season also, a distribution is 
made to all sections or colonies, of their share of new or rare 
seeds, slips, roots oP plants, or forests trees, and the same of- 
ferings are expeeted from them as far as circumstances can 
permit. 
Art. V. To each additional printed catalogue of new 
members, the names of those are added who, by neglect or 
emission of the regulations, cease to belong to the institution. 
46. Hail-Rod.—This instrament which was first put in 
in praetice by M. Lapostolle, professor of physic and chemis- 
try at Amiens, has been thought very useful in protecting from 
hail, vineyards, and other cultivated grounds in Europe. Dr. 
Pascalis, in an address delivered at a meeting of the New- 
York Seetion of the Linnzan Society of Paris, on the 13th 
of June last, after adverting to the discovery of this instru- 
ment, proceeded with the following remarks. 
“ After these attempts, a member of our Linnzan Society 
took up the experiment on an extensive scale, and with the 
view of obtaining a greater mass of testimonial evidence, he | 
experimented on a broad range of inhabited and cultivated 
farms in the department of the Pyrenees, protecting by the 
rod, those spaces which had been the most devastated by 
hail; and during the three seasons for the trial, of 1821, ’22, 
°23, the result wasagain highly corroborative. This being made 
-public, the use of hail-rods (paragreles) became popular in 
the environs of Munich, Trieste, Milan, and a great part of 
