Comments on use of 'air' lens rather than glass in some circumstances.
Comments on use of 'air' lens rather than glass in some circumstances.
Writes to thank WR for the paper on the thermodynamic theory of waves he sent; JH is too ill to respond or even to deal with the analysis in the paper. Nonetheless, JH does make some suggestions for WR's consideration.
Thanking him for his paper on heat developed in combination of acids and bases. Commenting on the various makes of calorimeters.
Comments on spelling reform being attempted in Germany and the United States, and being proposed in England.
Requests publication of a notice of the recalculation by H. J. R. Petersen of the Gaussian constants of terrestrial magnetism.
Has sent a note to Nature stating the details of the grant paid by the B.A.A.S. to H. J. R. Petersen for magnetic observations.
Note to accompany a translation of one of GE's writings; also comments on the 'reform' of the German language.