I had an ounce of the sulphate. He took enough to kill a horse, and asserted it had as good an effect as morphine. When this was gone, the only thing I had left was a chunk of crude opium, perhaps two or three pounds. He chewed this up and disappeared. I was greatly disappointed, because I would have laid in another stock of morphine to keep him at the laboratory. About a week afterward he was found dead in a barn at Perth Amboy." Returning to the work itself, note of which has already been made in this and preceding chapters, we find an interesting and unique reminiscence in Mr. Jehl's notes of the reversion to carbon as a filament in the lamps, following an exhibition of metallic-filament lamps given in the spring of 1879 to the men in the syndicate advancing the funds for these experiments: "They came to Menlo Park on a late afternoon train from New York. It was already dark when they were conducted into the machine-shop, where we had several platinum lamps installed in series. When Edison had finished explaining the principles and details of the lamp, he asked Kruesi to let the dynamo machine run. It was of the Gramme type, as our first dynamo of the Edison design was not yet finished. Edison then ordered the 'juice' to be turned on slowly. To-day I can see those lamps rising to a cherry red, like glowbugs, and hear Mr. Edison saying 'a little more juice,' and the lamps began to glow. 'A little more' is the command again, and then one of the lamps emits for an instant a light like a star in the distance, after which there is an eruption and a puff; and the machine-shop is in total darkness. We knew instantly which lamp had failed, and Batchelor replaced that by a good one, having a few in reserve near by. The operation was repeated two or three times with about the same results, after which the party went into the library until it was time to catch the train for New York." Such an exhibition was decidedly discouraging, and it was not a jubilant party that returned to New York, but: "That night Edison remained in the laboratory meditating upon the results that the platinum lamp had given so far. I was engaged reading a book near a table in the front, while Edison was seated in a chair by a table near the organ. With his head turned downward, and that conspicuous lock of hair hanging loosely on one side, he looked like Napoleon in the celebrated picture, On the Eve of a Great Battle. Those days were heroic ones, for he then battled against mighty odds, and the prospects were dim and not very encouraging. In cases of emergency Edison always possessed a keen faculty of deciding immediately and correctly what to do; and the decision he then arrived at was predestined to be the turning-point that led him on to ultimate success.... After that exhibition we had a house-cleaning at the laboratory, and the metallic-filament lamps were stored away, while preparations were made for our experiments on carbon lamps."