TniiisairKnts Society Xaivl .Ircliilccts and Marine Engineers. Vol. J(j. h)21. 



To illii.\'lratc j^aj^cr on "Pcsiyii and Coiistntctioii of I'a.ssciujcr S learners," 

 by li. II. I\i(jy, lisq., Member of Coiuieil. 



Plate 1/ 



