CONTENTS. 
ARTICLE 
I, —On the Composition and Derivation of Rosolic Acid. By 
R. Anaus Smira, Ph. D., FoR. S. ........c0ceerereecesss 
II.— On the Consumption of Coal in Furnaces, and the Rate 
of Evaporation from Engine Boilers. By Mr. JOHN 
TIT. — On the Triedral Partitions of the X-ace, and the Tri- 
angular Partitions of the X-gon. By the Rey. THo. 
P. Kirxman, A.M., F.R.S., Rector of Croft with 
Southworth, and Honorary Member of the Literary 
and Philosophical Society of Manchester............... 
IV.— On Improvement in Meteorological Registration. By 
Mr. THOMAS HOPEINS......,....c0ccceecensee eee neeeeeneeens 
YV.— On the General Solution of the Problem of the Polyedra. 
By the Rev. Tuo. P. Krrxmay, M. Ae Bases 
Rector of Croft with Southworth, and Honorary 
Member of the Literary and Philosophicol Society 
GH MANCHESGER Ce ccconcccecs env -ccrerenescacocnsroncseesbanss 
VI.— Experiments to determine the Properties of some Mix- 
tures of Cast Iron and Nickel. By Wtttam 
WATRBATE NH, Bis S-tectencts -ddescocnsec«soecdesamecsnsantec. 
VII.— On the Hardness of Metals and Alloys. By F. Cracr 
Catvert, M.R.A. of Turin, F.C.8., and Ricnarp 
POHNAON, HOLS. 2.06. ioeisane.cecness oveceossnseecsorerscesee 
VIII. — On a Yellow Colouring Matter obtained from the 
Leaves of the Polygonum Fagopyrum or Common 
Buckwheat. By Epwarp Scuunox, Ph.D., F.R. 8. 
IX.— Researches in the Higher Algebra. By James Cockuz, 
M.A., F.R.A.S., F.C.P.S., Barrister-at-Law. Com- 
municated by the Rev. R. Hartry, F.R.AS. ......... 
X. —Note on Dalton’s Determination of the Expansion of Air 
by Heat. By J. P. Journ, uO De <)> Bs 
XI. — On the Utilization of the Sewage of London and other 
large towns. By J. P. Journ, LL.D., E.R.S., &e.... 
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