ye ee ee 
FL Le Se ee ee ee Une nt ee 
3 
Geology and Natural History. 17 
dense granular sulphur separates and none passes off as polythi- 
onic acids. 
Ill. The CaCl, under the action of CO, restores CaCO,—the 
reagent for carbonizing the NaSO, of another lot; and the Cl 
passes back to the manganese for use again. 
Mg0+CaCl,4+CO,=MegCl,+CaCo.. 
If this beautiful series of reactions can be carried out in practice 
the names of Schaffner and Helbig will deserve a place in the list 
of industrial chemists next to that of Leblanc himself. J. p., or. 
II. Grotoagy anp Natura HIsTory. 
and Sea; by Henry Mircnett, Assistant. Appendix No. 8 i 
t of the American Continent is so 
rapidly rising that the change of depth over rocky bars upon the 
coast of Maine has been noticeable within a generation of practical 
boatmen ; and mentions Professor Shaler’s estimate of the emerg- 
ence In progress as probably over a foot in a century, and perhaps 
$ much as three feet. The author of this memoir, who was 
assistant under Professor Bache in the work of establishing 
benches at all the tidal stations along the coast of Maine, gives as 
the result of his study of the subject, the following conclusions : 
(1) That the attention of early explorers was attracted by the 
salt marshes, which broke the monotony of our otherwise then. 
wooded country, and that these were then, as now, at ordinary - 
level. 
high-water level 
: That rocks upon our coast, long notorious as dangerous to 
navigation, have not risen since they were first discovered. 
n his statements ancient maps and documents are cited, and 
the conditions of the various rocks are considered in detail. The 
memoir concludes as follows: 
‘From the foregoing it has been seen that the study thus far 
extends from Wood’s Hole, latitude 41° 31’, longitude 70° 39’, to 
ereé Rock, latitude 48° 30’, longitude 64° 13’, embracing 7° of 
latitude we nautical miles) and 6° 26’ of longitude (266 nautical 
t would, of course, be quite unwarrantable to conclude 
a parallelogram with these limits has remained unchanged, 
but a smaller district may be claimed as beyond dispute. If, 
Gele ourselves to Champlain’s points, we dr line from 
ree to Annapolis, va Scotia, thence i 
d 
oot lie Trinity Rocks, and near it Hard 
fai Ich have not changed during the past century; so that it is 
’ va to conclude that no tilt in either direction has taken place in 
Gulf of Maine. The are of the meridian between Green Ledge 
= 
