17. 
18, 
19. 
20. 
21. 
22. 
28. 
29. 
156 
‘Description of an Electrical Machine with a Plate Four Feet in 
Diameter .... also of a Battery Discharger... . and 
Some Observations on the Causes of the Diversity in the 
Length of the Sparks, erroneously distinguished by the 
Terms “ Positive” and “Negative.” Rodert Hare...... 
On the Relative Horizontal Intensities of Terrestrial Magnet- 
ism at Several Places in the United States, with the Inves- 
tigation of Corrections for Temperature and Comparisons 
of the Methods of Oscillation in Full and Rarefied Air. 
bP, BLCHE'S seen 0\0\ a vseis's Sm ni eteleiealaetae ==) =\° Rao Se 
Onthe Magnetic Dip at Scveral Places in the State of Ohio, 
and on the Relative Horizontal and Magnetic Intensities of 
Cincinnati and London. ohn Locke...... donongonods 
Contributions to Electricity and Magnetism—No, 3. On Elec- 
tro-dynamic Induction. Foseph Henry..... SSSR RE IRIC 
Engraving and Description of a Rotary Multiplier, or One in 
which One or More Needles are Made to Revolve by a 
Galvanie/Current. § e072 jesienleeeioeierets padencanc 
Observations to Determine the Magnetic Dip at Various Places 
in Ohio and Michigan. £. Loomiis...... hee 
. Observations of the Magnetic Intensity at Twenty-one Stations 
HO Di ae Welk VON ISAC Ga ae oa O OU SHdoo cocoanut 
. Contributions to Electricity and Magnetism—No. 4. On Elec- 
tro-dynamic Induction. ‘oseph Henry...ccesccececrece 
. Observations to Determine the Magnetic Dip at Various Places 
in the United States. £. Loomis.......... oe EN anes 
. Additional Observations on the Magnetic Dip in the United 
States: “25 Loomis ys ae revelers) slaveusisteteve ove sveverevetatenererene 
. Observations Made in the Years 1838-1843 to Determine the 
Magnetic Dip and Intensity of Magnetic Force. ohn 
ETB CE a eietalay seca are tam cientaraeece ee ete Spas wheat 
Observations on the Magnetic Dip Made in the United States 
AILSA. fee LVeCOLELE 3 - sy pdccudcnosonaoddbor 
Observations of the Magnetic Dip Made at Several Fasitions, 
Chiefly on the Southwestern and Northeastern Frontiers of 
the United States, and of the Magnetic Declination at the 
Positions on the River Sabine, in 1840. Yames D. Gra- 
QUE sears setts auslauart pate tanelavante p.ahaypreteineee Blateteravats.a.mipia-e a's 
. Observations of the Magnetic Dip of the United States. ZZ. 
LOOMIS: aes aia eke eee anehs njijaj sve; oie'e eicterpenats MiaLavars e.apiahave 
III, PROCEEDINGS. 
. Magnetic Experiments: ): Fakes ech. J eivcetins sc snes als : 
. Sherwood’s Discoveries in Magnetism. &. MZ. Patterson.... 
. Electro-dynamic Induction. oseph Henry. ...ccceccvccece 
. Rock Blasting by Galvanism. odbert Hare.........yec0ce 
Vv, 365 
viii, 283 
vill, 317 
ix, 329 
xi, 181 
i} (2a 
ees 
i, 54, 315 
i, 99 
