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338- of the perihelion of Mercury can be explained, and it would be int-eresting if Professor Brown's work could be extended so as to furnish from the lunar theory limits for the value of this compie- mentary term in --. The President, I imagine the chief reason why Prof. Brown has not discussed other suppositions is that his chief result shows that there is no room for any of them. His main result is that there is a remarkable agreement between theory and observation in the motion of the Moon,... and on that result we may heartily congratulate him. We do not always find, after a laborious piece of work, that there is an agreement such as we desire, but Dr. Brown has obtained it in a remarkable manner, and T am sure we all congratulate him upon his paper, and thank Prof. Newcomb for his comments upon it. Mr. Newall will now show us some beautiful results obtained by Prof. Hale with the new spectro-heliograph, and tell us the inferences which Mr. Hale is beginning to make from the results.
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