Smithsonian Miscellaneous Collections, Объемы 1-2Smithsonian Institution, 1862 |
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Стр. 41
... appears , and then filtering through asbestus . 1 eq . permanganate of potassa is equal to 10 eq . protoxide of iron . The iron test - liquid is prepared by dissolving 1 grm . pure iron - wire in 20 cubic centimetres pure muriatic acid ...
... appears , and then filtering through asbestus . 1 eq . permanganate of potassa is equal to 10 eq . protoxide of iron . The iron test - liquid is prepared by dissolving 1 grm . pure iron - wire in 20 cubic centimetres pure muriatic acid ...
Стр. 42
... appears that combustion with a mixture of chlorate of potassa and chromate of lead , or separation by chloride of copper or chloride of silver , yielded the best results . In the white iron from sparry ore , the amount of carbon was ...
... appears that combustion with a mixture of chlorate of potassa and chromate of lead , or separation by chloride of copper or chloride of silver , yielded the best results . In the white iron from sparry ore , the amount of carbon was ...
Стр. 52
... appears on the surface of the glass . In this manner ooo part of lead is shown . Elsner offers as a con- venient but more costly method of preparing absolutely pure mercury , to warm a solution of corrosive sublimate ( chloride of ...
... appears on the surface of the glass . In this manner ooo part of lead is shown . Elsner offers as a con- venient but more costly method of preparing absolutely pure mercury , to warm a solution of corrosive sublimate ( chloride of ...
Стр. 79
... appears reddish - yellow , and not brown , and is immediately dissolved in an equal weight of strong alcohol . 8 pts . of the solution are poured into 5 pts . oil of lavender , forming a clear brown liquid , containing platinum as ...
... appears reddish - yellow , and not brown , and is immediately dissolved in an equal weight of strong alcohol . 8 pts . of the solution are poured into 5 pts . oil of lavender , forming a clear brown liquid , containing platinum as ...
Стр. 87
... appears . The paper for the positive picture is laid for 2-3 minutes upon the surface of a solution of 3 pts . common salt in 10 pts . distilled water , carefully dried between blotting - paper , then passed for a few minutes through a ...
... appears . The paper for the positive picture is laid for 2-3 minutes upon the surface of a solution of 3 pts . common salt in 10 pts . distilled water , carefully dried between blotting - paper , then passed for a few minutes through a ...
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abdomen abdominal scutellæ alcohol alumina Amer ammonia angle anteorbital anteriorly antimony anus BAIRD band beneath body boiling BONAP broad brown carbonate carbonic acid carinated Chem chemical chief chloride color Coluber confluent copper cyanide dark dilute dissolved dorsal blotches Dorsal rows dorsal scales dorsal series dried electro-magnet elongated evaporated exterior frontals gold GRAY greenish ground-color head heated Herp HOLBR Hydrometallurgy iron Journ lime LINN liquid Lond loral Lower labials magnet margined metal mixture Morse muriatic acid narrow nasal nitric acid obtained occipitals oil of vitriol orbit outer row oxide Painted Pharm Philad posterior posteriorly postfrontals postorbitals potassa precipitate quantity rostral rows of scales salt saurita sides silver soda soluble solution species specimen spots stripe Subcaudal sulphate sulphuret sulphuric acid superciliaries surface tail telegraph transverse Upper labials Vertical plate warriors washed wire yellow yellowish zinc
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Стр. 23 - They gave rise to the various forms of electro-magnetic machines which have since exercised the ingenuity of inventors in every part of the world, and were of immediate applicability in the introduction of the magnet to telegraphic purposes. Neither the electro-magnet of Sturgeon nor any electro-magnet ever made previous to my investigations was applicable to transmitting power to a distance.
Стр. 13 - The sparseness of the wires in the magnet coils and the use of the single cup battery were to me, on the first look at the instrument, obvious marks of defect, and I accordingly suggested to the Professor, without giving my reasons for so doing, that a battery of many pairs should be substituted for that of a...
Стр. 15 - Morse as the inventor of an admirable invention, denied to him the additional merit of being a discoverer of new facts or laws of nature, and to this extent, perhaps, was considered unfavorable to some part of the claim of Mr. Morse to an exclusive right to employ the electro-magnet for telegraphic purposes. Professor Henry's deposition consists of a series of answers to verbal, as well as written, interrogatories propounded to him, which were not limited to his published writings, or the subject...
Стр. 13 - Morse was not familiar with the then existing state of the science of electro-magnetism. Had he been so, or had he read and appreciated the paper of Henry, the suggestions made by me would naturally have occurred to his mind as they did to my own. But the principal part of Morse's great invention lay in the mechanical adaptation of a power to produce motion, and to increase or relax at will.
Стр. 25 - around one of the upper rooms of the Albany Academy a wire of more than a mile in length, through which I was enabled to make signals by sounding a "bell. The mechanical arrangement for effecting this object was simply a steel bar, permanently magnetized, of about ten inches in length, supported on a pivot, and placed with its north end between the two arms of a horse-shoe magnet. When the latter was excited by the current, the end of the bar thus placed was attracted by one arm of the horse-shoe...
Стр. 20 - Economy of space is a great object in keeping skins, and such birds as herons, geese, swans, &c., occupy too much room when outstretched. In some instances, as among the ducks, woodpeckers, &c., the head is so large that the skin of the neck cannot be drawn over it. In such cases, skin the neck down to the base of the skull, and cut it off there. Then draw the head out again, and, making an incision on the outside, down the back of the skull, skin 'the head. Be careful not to make too long a cut,...
Стр. 24 - But be this as it may, the fact, that the magnetic action of a current from a trough is, at least, not sensibly diminished by passing through a long wire, is directly applicable to Mr. Barlow's project of forming an electro-magnetic telegraph;* and it is also of material consequence in the construction of the galvanic coil.
Стр. 22 - ... the electricity was diminished, and a greater quantity made to circulate around the iron from the same battery. The second method of producing a similar result consisted in increasing the number of elements of the battery, or in other words the projectile force of the electricity, which enabled it to pass through an increased number of turns of wire, and thus by increasing the length of the wire, to develop the maximum power of the iron. To test these principles on a larger scale, the experimental...
Стр. 25 - ... placed with its north end between the two arms of a horse-shoe magnet. When the latter was excited by the current, the end of the bar thus placed was attracted by one arm of the horse-shoe, and repelled by the other, and was thus caused to move in a horizontal plane and its further extremity to strike a bell suitably adjusted.
Стр. 21 - KS- 5. was extended by employing a still longer insulated wire, and winding several strata of this over the first, care being taken to insure the insulation between each stratum by a covering of silk ribbon. By this arrangement the rod was surrounded by a compound helix formed of a long wire of many coils, instead of a single helix of a few coils...