Item 195 - Letter from Alexander Dallas Bache

2 pp.

Philadelphia - ADB is happy to contribute as best he can to the materials WW seeks for his book. He has made copies of the tracts on tides which accompanied WW's note, and intends to distribute copies 'to those who may aid by furnishing observations upon the plan which has been sketched'. ADB may be able to get the various tide observations 'kept irregularly and at different times, at places on the Atlantic coast of the United States'. Some of the gentlemen of the military service as well as men of science 'may be willing to observe systematically'.