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The chemically complicated Blue Cross arsenic compounds were produced by Germany in a plant which was simplicity itself when compared with the marvellous installation developed to produce oleum, a concentrated form of the relatively simple sulphuric acid, a fundamental substance in explosives production.

Here is advice enough, I think, and too much, it may be, you will think, for one letter; if you follow it, you will get knowledge, character, and pleasure by it; if you do not, I only lose 'operam et oleum, which, in all events, I do not grudge you.

Here is advice enough, I think, and too much, it may be, you will think, for one letter; if you follow it, you will get knowledge, character, and pleasure by it; if you do not, I only lose 'operam et oleum, which, in all events, I do not grudge you.

Accordingly I began noting down, and using in my exercises, idiomatic or peculiar expressions: such as ‘oleum perdidi,’ ‘haud scio an non,’ ‘cogitanti mihi,’ ‘verum enimvero,’ ‘equidem,’ ‘dixerim,’ and the like; and I made a great point of putting the verb at the end of the sentence.

The oleum terrae, or earth oil, used chiefly as a preservative against the destructive ravages of the white-ants, is collected at Ipu and elsewhere.* There is scarcely any species of hard rock to be met with in the low parts of the island near the seashore.

This programme represented a determined effort to speed up munitions production in the autumn of 1916. It included not only gas but explosives, both of which could be supplied by the I.G. Explosives demanded oleum, nitric acid, and nitrating plants, which already existed, standardised, in the factories of the dye combine.

And then I went on to give a chain of witnesses. It was my duty to state what those witnesses said in their very words; and I did so; they were in Latin, and I gave them in Latin. One of them speaks of the "sacrum oleum" flowing "de membris ejus virgineis, maximè tamen pectoralibus;" and I so printed it; if I had left it out, this sweet-tempered writer would have accused me of an "economy."

Favourable as this result was, it was nevertheless a blow to me, who had made my plans for the following years dependent on whether I won the prize or not. Julius Lange, who knocked at my door one evening to tell me the result, was the witness of my disappointment. "I can understand," he said, "that you should exclaim: 'Oleum et operam perdidi!, but you must not give up hope for so little.