SO ee ee a ee ee eS ee 
ees ee 
CONTENTS. vii 
NUMBER XLIL 
Pag 
Arr. XL. a the Pees of the Zodiacal Light; by ? 
ae 6 
R sak Ba 5 Ad OR ace a ena Rte ae ae 
L— 
Virginia by Wo. M. Fowratwe secs s 459 
XLU.—On the Use of Potassium Dichromate in Ultimate 
4 
Organic renters by 5: W.-JORMEON, yoni 25555. 1; 65 
XLITI.—On Helde rberg Rocks in N. set : by C, H. Ler 468 
XLIV.—Rabies Mephitica ; by Horace C, Hovey, .... .... 477 
XLV.—On the nature of the notion of Light. tae Silver 
48 
Bromide ; by AREY Lea, onan ounewenes ee 3 
x —Notes on some of the Fossils s figured in the recen tly- 
issued Fifth volume of the Tilinois State Geological Re- 
4 
; by EEK, 
XLVIL— Brief Contributions from the a Laboratory 
of Harvard College: No. V.—On a method of freeing a 
Magnetic Bar from the influence of the Earth’s Magnet- 
ism; by JOHN TROWRRIDGR,: 62. o0 i 55 eee 490 
No. VIL—A Note on Melde’ s Experiment; by W. Lowery, 493 
No. VII. a wipes Adjuster for the Holtz Machine; by 
James J. MINOT, «6 oc o34i ok ee i ee ae eed 494 
No, VII. — Effect of Condensers on the Brush Discharge 
from the Holtz Machine; by J. W. Fewxes,.--...---- 496 
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SCIENTIFIC INTELLIGENCE. 
ra and Physics.—On the Specific Heats of Zirconium, Silicon and Boron, 
506 nm a nt 1 Flame, THA, 
—0On the so-called Continuing Rays of Beequerel, H EL, 508,—On the 
Solubility of ag pre Oxide, STELZER, 509. the Constitution of Anthra- 
* RP: On a new Amyl Alcohol. BACKHOVEN, 510.—A 
new Spitteais of Machol WaGNER and SAaYTZzer i OF- 
ilongations due to Electricity, H palin a 511.—Selenium Photo- 
meter, EARL 12.—Aco ae at and Opacity of the At- 
mosphere, TYNDAL 513.—Reflection of Soun db 2, 
Geology and Natural History—On Mountai a Sealpre in the Sierra Nevada; by 
KE. S. Carr, 515 -—Note on the recent Voleehis Action in Hawaii; by T. Coan, 
Highs of = ew Jer sey: ens; 
See hin eke die "erretung des Kall a der Pinegicoao ia 
ag Gestoinen tenn reste E. Boricxy: Das Elbthalgebirge in Sachsen; von H. 
B. Gemirz: edings of the Californ ia Academy of Pea On Unakyte ; 
by F. H. Seis. 519.—Analysis of “ F «! Novaculite; :” by C. E. Warr: Note on 
athe : : : 
rado; by T. C. Porter and J. M. Courter, 520.—On the amoun + eee | 
the sa sap of Plants ; by W. 8. CLanxe, aa : 
The Polaris maria Coe, 527.—The eae ts Gene: by W. Sarees, ee 
—On Mr. Meek’s note, . 873 of this vol, E. BILLINGS : Corrections for the 
paper on page 193; by JAMES BLAKE, 530 
