nig at pleasure a blast furnace near any still water, where the wheel will nevertheless revolve by means of the fire, which will put the water in motion; likewise some kinds of air-guns that are loaded in a moment, and discharge sixty or seventy shots in succession without any fresh charge. Towards winter, perhaps, I shall draw and describe these machines. I should like to have the opportunity and the means of setting one or other of them up and getting it to work.
"The day after to-morrow I will travel to the Kinnekulle,[1] to select a spot for a small observatory, where I intend, towards winter, to make some observations respecting our horizon, and to lay a foundation for those observations by which my invention on the longitude of places may be confirmed: perhaps I may then travel in all haste first to Upsal, to get some things I need for it.
"Please let me know whether Professor Upmark has yet obtained his appointment. If there is anything in which I can be of use to you again, I wish you would inform me of it. Will you be so good as to recommend me to any of the professors for any opening that may present itself? The rest I shall myself see to. By the next opportunity I will send you something which I saw through the press before returning home: it is an oration on the King's return, and also some fables like those of Ovid, which I have called Camena Borea, and have dedicated to Cronhjelm. I am waiting impatiently for your oration, about which you said a few words in your last letter. Remember me a thousand times to Anna. Whatever additional success I may have in my designs, I will first communicate to you. I wish you would allow me to do so. Meanwhile I live in the hope of being allowed to remain, most learned friend and brother, your most obedient brother and servant,
On the 2ist of November, he writes to the same friend from Stockholm,—
- ↑ A fine mountain near Lake Wetter, over nine hundred feet above the sea.
