Your father will doubtless send you all the news of the times, as well as local information, and so I will only add that the Laboratory [rowing] crew were again beaten last week. The races were very good—better as regards equality than last year. The umpire, poor R⸺, got upset and nearly suffocated in the Irwell mud!
Hoping to see you safe back at the end of July or beginning of August.
The day after this letter was written Roscoe received some of the preliminary results of the photometric observations, so that he was enabled to give his Royal Institution audience some idea of the amount of chemical light in the tropics. He made this matter one of the chief features of his lecture.
I have only just time to send what you want over to Liverpool this afternoon, and to acknowledge your letter of April 14th with enclosures, which are all very welcome.
…
The diffused and direct sun experiments are very interesting. They differ in toto from the Heidelberg results. Pray get some more at low elevations of the sun.
I must now close … as the Jerome sails early in the morning.
P.S.—I hope you may be able to get one cloudless day before you leave, as the clouds evidently much modify the result. It is almost a pity that you did not go out in the vacation for September and October, but it cannot be helped now.
If you get a cloudless day begin early, take four or six sets of observations (one at noon, of course) until late in the evening, so as to get the low elevations.