CHAP. VII.] FELLOW OF TRINITY. 219 



represents them. I would rather be taken for a Yezide than 

 for one of Maurice's popular religionists. 



To HIS FATHER. 



Trin. Coll., 17th October 1855. 



The lectures were settled last Friday. I am to do the 

 upper division of the third year in hydrostatics and optics, 

 and I have most of the exercising of the questionists. 



FROM HIS FATHER. 



Glenlair, 20th October 1855. 



If you do a book for M'Millan on optics, do not let him 

 hurry it on. Take full time to yourself to revise and 

 re-revise the MS., and let anything published be creditable. 

 Do nothing in a careless manner, and so get a bad name. 

 A first work especially should be very carefully got up. 



When you are set to lecture on hydrostatics and optics, 

 have you any apparatus for illustration ? 



To HIS FATHER. 



Trin. Coll., 25th October 1855. 



I have refused to take pupils this term, as I want to get 

 some time for reading and doing private mathematics, and 

 then I can bestow some time on the men who attend lectures. 



I go in bad weather to an institution just opened for 

 sports of all sorts jumping, vaulting, etc. By a little 

 exercise of the arms every day, one comes to enjoy one's 

 breath, and to sleep much better than if one did nothing but 

 walk on level roads. 



1st November 1855. 



I have been lecturing two weeks now, and the class 

 seems improving, and they come up and ask questions, which 

 is a good sign. 



I have been making curves to show the relations of 

 pressure and volume in gases, and they make the subject 

 easier. I think I told you about the Eay Club. I was 



