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The photographing of the interior of the Pyramids, by Prof. Piazzi Smith, has not proved successful in an artistic point of view, on account of the extremely vitiated state of the air within the close passages constantly visited by travelers with numerous torches and candles, by reason of which the magnesium wire burned with much impaired brilliancy. Some limited views, sufficing however to establish disputed measurements, were taken, though only one picture could be obtained within twenty-four hours, the magnesia smoke requiring this time to settle. A mixture of magnesium filings and mealed powder was said to produce a better effect than the wire.
The following comparison of the magnesium wire with other sources of light is of interest. Four wires weighing three grains per foot, each burning at the rate of eight inches per minute, or eight grains in that time, give a light equal to 288 sperm candles, or 214 Argand gas-burners. At this rate of consumption one ounce of wire, costing $6.50 would last one hour.
British Journal of Photography.—A curious French toy has lately been exciting much attention. It is called the egg of Pharaoh's serpent, and consists of sulpho-cyanide of mercury made into a little conical pellet like a pastel. This being ignited, burns with a blue flame giving out a long coil of a consistent material resembling a snake in its length and convolutions, and seemingly a hundred times larger than its parent egg:
Professor John F. Frazer here showed the operation of some of these serpent eggs, prepared by the Messrs. Wyeth, and explained their action, as, also, the history of the substance mellon which is the bulky product of their combustion.
Mr. Coleman Sellers showed some others made by Messrs. Bullock & Crenshaw.
The meeting was then, on motion, adjourned.
H. MORTON, Secretary.
The Practical Entomologist. A monthly bulletin published by the Entomological Society of Philadelphia, for gratuitous distribution among farmers and agriculturists.
A very neatly printed journal, apparently devoted to the distribution of information on the subject of insects noxious and useful (?) to plants and farmers.
We do not doubt the value of the knowledge thus disseminated, and we believe that the gratuitous distribution by the Society may carry it where it will be useful. At all events, we are glad to see this indication of health and energy in this young Society.
Page 351, line 6 from top, for "inclends," read "materials."
A Comparison of some of the Meteorological Phenomena of OCTOBER, 1865, with those of OCTOBER, 1864, and of the same month for FIFTEEN years, at Philadelphia, Pa. Barometer 60 feet above mean tide in the Delaware River. Latitude 39° 57′ N.; Longitude 75° 11' W. from Greenwich. By JAMES A. KIRKPATRICK, A. M.
*Sky one-third or less covered at the hours of observation.
Air prior to the Discovery of Oxygen,-On the Supposed Nature of
138, 195, 248, 341
Albumen; Its Application to Calico Printing and Photographing,-F. C.
Ammonium,-Pharaoh's Serpents' Eggs,-The preparation of Sulphocyanide of 142
Animal Charcoal,-On the Revivification of
Fatty Matters,-F. C. Calvert's Lecture on
Atmospheric Pressure as a source of Mechanical Power,
Avanturine Glass,-New Green
Bile, its properties; Blood, its Composition and Application in Refining
Sugar and Manufacture of Albumen,-F. C. Calvert's Lecture on
Blasting Powder.-Substitute for
Bourdon Pressure Gauge,-J. D. Van Buren on the
Bouton, (W.) on Minimum Material in a Trussed Girder,
Bridges,-On the size of Pins for Connecting Flat Links in Chains of
Bryson, (W.) on the Strength of Cast Iron and Timber Pillars,
Cadet Engineer; or, Steam for the Student. By John H. Long,
Curious Facts in the History of Insects. By Frank Cowan,
Cadet Engineer; or, Steam for the Student. By J. H. Long,-Notice of the 287
Iron,-H Bessemer on the Manufacture of
Cements, Mortars, and Concretes,-C. H. Has well on Limes,
Chemistry Applied to the Arts,-Lectures by F. C. Calvert on
102, 187, 244, 336, 397
Clark (J.) on the Problem of the Gyroscope,
Coal Gas, Results of the Experiments on the Carburation of
of the World,-Statistics of the
per Horse Power,—On the Average Consumption of
Colburn (Z.) on Certain Methods of Treating Cast Iron in the Foundry,
Cotton Fibre,-F. C. Calvert on the Action of Silicate and Carbonate
of Soda in
Cut-offs,-On Expansion by
Decay of Material in Tropical Climates and the Methods Employed for
Arresting and Preventing it,
Draft Regulator,-Self-acting Pressure and
Drainage Works and Water Supply,-Suggestions on
Elements and their Compounds,-On the Specific Refractive Energies of the
Electricity,-Measurement of Inductive Resistances
Engines from 1851 to the Present time,-On Marine
Engraving,-Another New Process of
Entomologist,-Notice of the Practical
Erith Explosion and the Repair of the Thames Embankment,-On the
Field Boiler, its Principle, Construction, and Action,-Description of the
Foundry,-On Certain Methods of Treating Cast Iron in the
Occurrence of Petroleum in Canada,―T. D. Rand's paper on
Gas,-Results of the Experiments on the Carburation of Coal
Gauges and other Instruments used in Steam Engineering,—Pressure
Giffard Injector,-An Improvement in the
Girder,-W. Bouton on Minimum Materials in a Truss
Work,-On Uniform Stress in
Girders,-D. V. Wood on General Problem of Trussed
Process and Appliances in the Manufacture of Polished Sheet
Haswell (C. H.) On Limes, Cements, Mortars, and Concretes,
Indian Engineering,—On the Peculiarities of
Inductive Resistances,—Electricity,-Measurement of
Inventors and the Crown; an Infringement by the Admiralty of England,
Iron and Timber Pillars,-W. Bryson on Strength of Cast
H Bessemer on the Manufacture of Cast Steel, its Progress, and
in the Foundry,-On Certain Methods of Treating Cast
Water Pipes,-On the Strength of Cast
Jackson (H.) and Ott (W. A.),-On a new Process for Extracting Gold
Lead,-On the Erosion of
Leather,-F. C. Calvert's Lecture on
Limes, Cements, Mortars, and Concretes,-C. H. Haswell on
--Recent Applications of
Marine Engines from 1851 to the Present Time,
Mechanical Power,-Atmospheric Pressure as a Source of
Milk; its Composition, Properties, and Preservation,-F. C. Calvert's
Mirrors,-Process for making Platinum
Mont Cenis,-Railway over
Mortars, and Concretes,-C. H. Haswell on Limes, Cements,
National Lyrics. By J. G. Whittier,-Notice of
New Zealand Coal Mines,-Notice of the
Nystrom, (J. W.,) on Work and Vis-Viva,
Oblique Bridge,-Intersection of Joints of an
Oxygen,-On the Supposed Nature of Air prior to the Discovery of
in Canada, T. D. Rand on the Occurrence of
Pillars,-W. Bryson on Strength of Cast Iron and Timber
Pumping Engine Practically and Commercially considered,-The Economy of 200
Railway Collision,-On the Prevention of
over Mont Cenis,