[DIAG HERE] Just sent off my other letter thought of a much better plan There are 3 string from wheel going over 3 pulles these strings all go down under the big cylindr and are fasten to the ends of 3 radial, equal rods ao bo co, (drawn in perspective in my picture) forming a rigid frame in a horizontal plane, from the centre and at rt [angle]s to this plane is fixed another rod oD hanging vertically down-wards (when cylinder is straight) with scale pan at its end. If the cylinder moves sideways there will be a greater tention on the string coming from the side from wh it moves so it will pul it back again. * It must act I’m excited about it
* because rod oD will be pulled out) of the vertical)
Status: Draft transcription
This transcript was produced as a side-product of the work of the Darwin Correspondence Project and may not have been proofread to the DCP’s usual standards.
Please cite as “FL-1525,” in Ɛpsilon: The Darwin Family Letters Collection accessed on 28 April 2024, https://epsilon.ac.uk/view/darwin-family-letters/letters/FL-1525