The laboratory was a very large and lofty place, built of brick and iron, with broad bay-windows facing the greenery of the park. An immense table laden with apparatus was set in the centre, and all round the walls were appliances, machine tools, with models, rough drafts of plans, and electrical furnaces on a reduced scale in the corners. A system of cables and wires hanging overhead from end to end of the room brought the electrical motive force from the neighbouring shed and distributed it among the appliances, tools, and furnaces, in order that the necessary experiments might be made. And beside all this scientific severity was a warm and cosy retreat in front of one of the windows, a retreat with low bookcases and deep armchairs, the couch on which the brother dozed at appointed hours, and the little table at which the sister sat while watching over him or assisting him like a faithful secretary.
Jordan touched a switch, and the whole room became radiant with a rush of electric light.
'So here I am!' said he. 'Really now, I only feel all right when I'm at home. By the way, that misfortune which compelled me to absent myself happened just as I was becoming passionately interested in a new experiment—I shall have to begin it again. But, mon Dieu! how well I feel!'
He continued laughing; colour had come to his cheeks, and he showed far more animation than usual. Leaning back on the couch in the attitude he usually assumed when yielding to thought, he compelled Luc also to sit down.
'I say, my good friend,' he continued, 'we have plenty of time—have we not?—to talk of the matters which made me so desirous to see you that I ventured to summon you here. Besides, it is necessary that Sœurette should be present, for she is an excellent counsellor. So if you are agreeable we will wait till after dinner, we will have our chat at dessert. And meantime, how happy I feel at having you there in front of me to tell you how I am getting on with my studies! They don't progress very fast, but I work at them, and that's the great thing, you know. It's enough if one works two hours a day.'
Then, this usually taciturn man went on chatting, recounting his experiments, which as a rule he confided to nobody, excepting the trees of his park, as he sometimes jestingly exclaimed. An electrical furnace being already devised, he had at first simply sought how it might be practically employed for the smelting of iron ore. In Switzerland, where the motive power derived from the torrents enabled one to perform certain work inexpensively, he had inspected furnaces which melted aluminium under excellent conditions. Why should it not be possible to treat iron in the same way? To solve the problem it was only necessary to apply the same principles to a given case. The blast-furnaces in use gave scarcely more than 1,600 degrees of heat,[[1]] whereas 2,000 were obtained with the electrical furnaces, a temperature which would produce immediate fusion of perfect regularity. And Jordan had without any difficulty planned such a furnace as he thought advisable, a simple cube of brickwork, some six feet long on each side, the bottom and crucible being of magnesia, the most refractory substance known. He had also calculated and determined the volume of the electrodes, two large cylinders of carbon, and his first real find consisted in discovering that he might borrow from them the carbon necessary to disoxygenate the ore, in such wise that the operation of smelting would be greatly simplified, for there would be but little slag. If the furnace were built, however, or at least roughed out, how was one to set it working and keep it working in a practical, constant manner, in accordance with industrial requirements?
'There!' said he, pointing to a model in a corner of the laboratory. 'There is my electrical furnace. Doubtless it needs to be perfected; it is defective in various respects, there are little difficulties which are not yet solved. Nevertheless, such as it is, it has given me some pigs of excellent cast iron, and I estimate that a battery of ten similar furnaces working for ten hours would do the work of three establishments like mine kept alight both by day and night. And what easy work it would be, without any cause for anxiety, work which children might direct by simply turning on switches. But I must confess that my pigs cost me as much money as if they were silver ingots. And so the problem is plain enough: my furnace, so far, is only a laboratory toy, and will only exist with respect to industrial enterprise when I am able to feed it with an abundance of electricity at a sufficiently low cost to render the smelting of iron ore remunerative.'
Then he explained that for the last six months he had left his furnace on one side to devote himself entirely to studying the transport of electrical force. Might not economy already be realised by burning coal at the mouth of the pit it came from, and by transmitting electrical force by cables to the distant factories requiring it? That again was a problem which many scientists had been endeavouring to solve for several years, and unfortunately they all found themselves confronted by a considerable loss of force during transit.
'Some more experiments have just been made,' said Luc with an incredulous air. 'I really think that there is no means of preventing loss.'
Jordan smiled with that gentle obstinacy, that invincible faith which he brought into his investigations during the months and months which he at times expended over them before arriving at the slightest grain of truth.