PROCEEDINGS 
OF THE 
ROYAL SOCIETY OF EDINBURGH. 
vol. xxx. 1909-10. 
I. — Andrews’ Measurements of the Compression of Carbon Dioxide 
and of Mixtures of Carbon Dioxide and Nitrogen. Edited by 
Professor C. G. Knott. 
After the death of the late Professor Tait in 1901, I was asked by the 
Council of the Royal Society of Edinburgh to carry to completion the 
task which Professor Tait had undertaken of presenting Professor 
Andrews’ epoch-making work in such a form as to make possible the 
estimation of the true pressures. 
At the meeting of February 20, 1899, Professor Tait communicated the 
first instalment of a paper on “ The Experimental Bases of Professor 
Andrews’ Paper on the Continuity of the Gaseous and Liquid States of 
Matter {Phil. Trans. 1869)/’ Considerable progress was made during the 
succeeding months in printing in a form similar to the original the observed 
numbers and interpolated calculations in Andrews’ experimental note- 
books ; and the galley proofs had undergone a first revision. Among 
Professor Tait’s manuscripts the following draft was found, evidently 
intended to be the opening paragraphs of the description of these verbatim 
extracts from the notebooks : — 
“ In February last there appeared in Nature a letter from Professor 
Tsuruta of Tokyo calling attention to two important questions connected 
with the accurate reduction of the series of experiments described in 
Dr Andrews’ epoch-making Bakerian Lecture of 1869. Andrews was 
particularly careful to explain that his own reductions were merely 
provisional, though sufficient for his immediate purpose. 
“ The first of these depended on the calculation of true pressures by the 
air manometer which Andrews was forced to employ and to interpret by 
vol. xxx. 1 
