6. Two Ruhmkorff coils, which, by means of a current of electricity, would ensure us a very excellent, easily carried, and certain means of obtaining light.
7. A voltaic battery on the newest principle.[1]
[1] Thermometer (thermos, and metron, measure); an instrument for measuring the temperature of the air.—Manometer (manos,and metron, measure); an instrument to show the density or rarity of gases.—Chronometer (chronos. time, and metros, measure) a time measurer, or superior watch—Ruhmkorff's coil, an instrument for producing currents of induced electricity of great intensity. It consists of a coil of copper wire, insulated by being covered with silk, surrounded by another coil of fine wire, also insulated, in which a momentary current is induced when a current is passed through the inner coil from a voltaic battery. When the apparatus is in action, the gas becomes luminous, and produces a white and continued light. The battery and wire are carried in a leather bag, which the traveler fastens by a strap to his shoulders. The lantern is in front, and enables the benighted wanderer to see in the most profound obscurity. He may venture without fear of explosion into the midst of the most inflammable gases, and the lantern will burn beneath the deepest waters. H. D. Ruhmkorff, an able and learned chemist, discovered the induction coil. In 1864 he won the quinquennial French prize of £2,000 for this ingenious application of electricity—A voltaic battery, so called from Volta, its designer, is an apparatus consisting of a series of metal plates arranged in pairs and subjected to the action of saline solutions for producing currents of electricity.
Our arms consisted of two rifles, with two revolving six-shooters. Why these arms were provided it was impossible for me to say. I had every reason to believe that we had neither wild beasts nor savage natives to fear. My uncle, on the other hand, was quite as devoted to his arsenal as to his collection of instruments, and above all was very careful with his provision of fulminating or gun cotton, warranted to keep in any climate, and of which the expansive force was known to be greater than that of ordinary gunpowder.
Our tools consisted of two pickaxes, two crowbars, a silken ladder, three iron-shod Alpine poles, a hatchet, a hammer, a dozen wedges, some pointed pieces of iron, and a quantity of strong rope. You may conceive that the whole made a tolerable parcel, especially when I mention that the ladder itself was three hundred feet long!
Then there came the important question of provisions. The hamper was not very large but tolerably satisfactory, for I knew that in concentrated essence of meat and biscuit there was enough to last six months. The only liquid provided by my uncle was Schiedam. Of water, not a drop. We had, however, an ample supply of gourds, and my uncle counted on finding water, and enough to fill them, as soon as we commenced our downward journey. My remarks as to the temperature, the quality, and even as to the possibility of none being found, remained wholly without effect.
To make up the exact list of our traveling gear—for the guidance of future travelers—add, that we carried a medicine and surgical chest with all apparatus necessary for wounds, fractures and blows; lint, scissors, lancets—in fact, a perfect collection of horrible looking instruments; a number of vials containing ammonia, alcohol, ether, Goulard water, aromatic vinegar, in fact, every possible and impossible drug—finally, all the materials for working the Ruhmkorff coil!
My uncle had also been careful to lay in a goodly supply of tobacco, several flasks of very fine gunpowder, boxes of tinder, besides a large belt crammed full of notes and gold. Good boots rendered watertight were to be found to the number of six in the tool box.
"My boy, with such clothing, with such boots, and such general equipment," said my uncle, in a state of rapturous delight, "we may hope to travel far."
It took a whole day to put all these matters in order. In the evening we dined with Baron Trampe, in company with the Mayor of Reykjavik, and Doctor Hyaltalin, the great medical man of Iceland. M. Fridriksson was not present, and I was afterwards sorry to hear that he and the governor did not agree on some matters connected with the administration of the island. Unfortunately, the consequence was, that I did not understand a word that was said at dinner—a kind of semiofficial reception. One thing I can say, my uncle never left off speaking.