, 



v**t>% 



\ _^-— «=*- \ },k rvri' 





_. /Vt»n t>eJ ■| , «M•>w1' , 





t&-n.4<&' k t j anal' 

 aF A\™ J ■ . 



v» a . ill Varn^v ./" 



Figure 32— Striking clock sketch found in Bertolla's manuscripts. {Courtesy of Museo No- 

 zionah della Sam ;./ 1 •!< lla 1 in mVa, Milan.) 



68 



BULLETIN 240: CONTRIBUTIONS FROM THE MUSEUM OF HISTORY AND TECHNOLOGY 



