@book{bhlitem250290, title = {Philosophical transactions. Series A: Mathematical and physical sciences }, volume = {v.219(1919)}, copyright = {Public domain. The BHL considers that this work is no longer under copyright protection}, url = {https://www.biodiversitylibrary.org/item/250290}, note = {https://www.biodiversitylibrary.org/bibliography/22577}, publisher = {London, }, author = {Royal Society (Great Britain) and Royal Society (Great Britain)}, year = {1919}, pages = {714}, keywords = {Mathematics|Physics|Science|Societies, etc|}, }