Rack-and-pinion lifting device and a cart part
A geared lifting mechanism, with a note on an iron plate to stop the cart wearing the rail
A dark-inked lifting device drives a toothed vertical rack (cremagliera) through a pair of gears, drawn beside a lighter red-chalk cart frame. A caption explains that a b is an iron plate set so the rubbing of the cart does not wear away the base of the side-rail. A short block of mirror-writing at upper right is present but not transcribed.
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Lifting device with a toothed rack
A pair of meshing gears engages a serrated vertical rack, forming a lifting mechanism (congegno di sollevamento con cremagliera). The cart frame is sketched above and to the right.
Iron plate against friction and wear
The note explains that a b is an iron plate placed so the rubbing of the cart does not wear away the base (fondamento) of the side-rail. It addresses friction between the moving cart and its supporting rail.