Leveling devices and mechanical sketches
Two leveling devices with letter labels on 902a; unlettered long-armed mechanisms on 902b
The verso of the same two sheets continues with mechanical studies. On 902a (verso) are two leveling devices, one at the foot marked 'white' and 'veil', the other seen with the sheet turned on its side and lettered L, h, a, d, e, f, g, h, i and b. Sheet 902b bears no writing but is covered with drawings of long-armed, cross-braced devices, one of which resembles a crossbow, described here from the image.
On this page
Leveling device (labels: white, white, veil)
At the foot of sheet 902a (verso) is a device for leveling, its parts noted as 'white', 'white' and 'veil'. The words seem to mark sighting elements of the instrument. Only these terms accompany the drawing.
Second device (labels L, h, a, d, e, f, g, h, i, b)
Turning the sheet onto its right side reveals another device carrying the letters L, h, a, d, e, f, g, h, i and b. The labels key parts of the mechanism to an absent explanation. No prose is transcribed for it.
Untranscribed mechanisms on sheet 902b
Sheet 902b (verso) is recorded as bearing no writing, yet it is covered with drawings of long-armed devices and cross-braced frames, one of which resembles a crossbow on a stock. These are given without captions. The forms are noted here from the image alone.