Try gluing it with fish glue onto the leather, and let this be a thin strip.

Stamp it with a permanent body, part by part, making such a strip in one piece. Draw out the mold with iron-charged (ferrous) water.

Procure a blowpipe and blow into it; or imprint a uniform rod with paper. Let there be driven into the square set in the middle of the knot -- which should be deeper than the others so it can hide the head of the tack -- and then let it be tinted black and varnished together with the other squares; and let the rest of the ground be of black velvet and a knot of gold; and thus one will not have to cut out the squares of that knot, tinting the other ground with such black. It can be worn down with a wheel-file, as razors are made. And one porter will do the work of 10 workers. Or else with a wheel of stone and water, and then at once wash and dry the moisture in an oven. Then scrape with a brass scraper and it will regain its fine luster.

a b c.

Every part of the wave that strikes upon the other wave reflects back toward the centers of their circles.

There is a movable body that does not move by its feet changing place, and yet it does not change place in the air. Either it is in a boat, or it is in a wind that moves with the movable body. Nothing takes of itself motion, or leap, or progressive bounce without a fixed support.

Make the design on tempered steel and hollow it out, changing the cutting tool 2 or 3 times so that the steel is a pierced plate. Then put it on the anvil, so it sits well settled. Then place the thin brass plate and above it the thin lead, [as thick as] 2 knife-backs, and then strike the blow 'at castello' (like a die) over the center. Then remove the brass and wear down the relief of the brass from the reverse with a file, either with a large file-wheel or with a stone one. Make the stamp of cast, tempered steel.

File-wheel. It is impossible that a ray born of the sun could intersect with another ray born of the sun.

Through this tube the flame has to exhale and be nourished. The exhalation passes through the middle, and the nourishment comes from the sides, surrounding that exhalation.

48 6 - 10 8.

a b c d. Let a b c d be a very thin flask, that is of thin glass and blown in a plaster mold, which holds impressed a lead [mold] for grinding spectacles for those of 60 years; and let this flask be a finger thick at the ends and half a finger in the middle, and one-third [braccio] long and one-sixth wide, and let it be full of water.

Action and passion are in the patient, and action is a certain motion. Action and passion are founded upon motion. All motion is measured by time. If motion were a thing distinct from the movable body, it would follow that the movable body necessarily moves through some space -- which is impossible, that the movable both moves and does not move through some space. All motion is the act by which the movable body is moved. If motion is to be, it is required that the movable and the mover exist first. In the 2nd [comment] on the 8th [book] of the Physics.

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