EINSTEIN, Albert. Autograph letter signed ('Papa') to his son, Hans Albert, n.p., [postmark 6 August 1945], one page, 4to, envelope.

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細節

EINSTEIN, Albert. Autograph letter signed ('Papa') to his son, Hans Albert, n.p., [postmark 6 August 1945], one page, 4to, envelope.

SUGGESTED APPLICATIONS FOR HIS SON'S TECHNICAL WORK. Einstein writes in appreciation of a paper by Hans Albert, 'I find your model very fine and have now worked out what it is all about. A shaft propels two elements with opposing motions, whereby the amplitude of one may be varied using a setting-lever. But I still haven't really understood what application you have in mind for it. Is it a control for the ventils of a motor? Or does the element with adjustable amplitude work as a control for the volume of a pump for injecting fuel into a cyclinder?'; he goes on to ask what set Hans Albert on to this construction, and proposes a potential difficulty with the resistance of the lever.

注意事項

Buyers from within the EU: VAT payable at 17.5% on just the buyer's premium (NOT the hammer price) Buyers from outside the EU: VAT payable at 17.5% on hammer price and buyer's premium. If a buyer, having registered under a non-EU address, decides that an item is not to be exported from the EU, then he/she should advise Christie's to this effect immediately.

拍場告示

Please note that this lot is not illustrated in the catalogue, the image of page 129 is in fact lot 133 and not 135.