Balance of two weights and the lamp's wheel
Red-chalk study of weights a and b over a pulley, with hoisting sketches
A red-chalk sheet showing two weights a and b hung over a pulley at the top and a group of hoisting and inclined-plane sketches below. The note reasons that a and b stand in balance, so that moving a from b costs the effort of one, while moving b from a takes four to move one, with the same difficulty as one moving four. A further remark records that the device was 'made for the wheel of the lamp'. Additional red-chalk sketches on the sheet were not included in the transcription.
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Two weights a and b in balance
The weights a and b are said to stand in balance: to move a from b takes the effort of one, but to move b from a, four moves one, with the same difficulty as one moves four. The note weighs the mechanical advantage in shifting the loads over the pulley.
Made for the wheel of the lamp
A caption records that the mechanism was made for the wheel of the lamp, tying the weight-and-pulley arrangement to a specific lamp device.
Hoisting and inclined-plane sketches
Below the pulley, several faint red-chalk sketches show inclined beams, a hoist or crane framework, and horizontal rails. These untranscribed studies extend the mechanical theme of the sheet.