![EINSTEIN, Albert. Autograph letter signed ('Papa') to his son, Hans Albert, n.p., [postmark 6 August 1945], one page, 4to, envelope.](https://www.christies.com/img/LotImages/2005/CKS/2005_CKS_07088_0135_000(110228).jpg?w=1)
Details
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.
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.
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Sale room notice
Please note that this lot is not illustrated in the catalogue, the image of page 129 is in fact lot 133 and not 135.