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1907-8.] Dr Edward Sang’s Tables. 
The Committee appointed by the Council in 1905 to consider and report 
on the value of Dr Sang’s Manuscript Volumes, which have now been 
gifted by his daughters to the Nation, asked the opinion of eminent 
calculators abroad. Extracts from the replies received from Dr Bauschinger 
and Dr Ristenpart are appended. 
Extracts from Letter (27th May 1905) received from Dr F. Bauschinger. 
“ I can only express my highest admiration regarding this gigantic 
work, which I could never have believed it possible for a single man to 
accomplish. The whole plan I regard as exemplary, and of great and 
lasting scientific value. I believe the whole calculating world will 
welcome with joy the realisation of your endeavour to make this work 
of fundamental significance easily accessible. A complete printing is 
impossible ; but it is not necessary if the following plan is adopted. Let 
the whole work be purchased and deposited in a safe place, where it may 
be seen on inquiry by anyone interested. Let vol. 4 (log primes) be 
photographed, and a small number of prints distributed among several 
institutions. Let vols. 7-11, 17-21,. 39, 41, 42, 43 be printed and offered 
for sale ; their significance is immense, and will increase year by year. For 
the work which I am at present planning it would be of the greatest 
service to me if vols. 7-11 and 17-21 were already accessible. I regard 
the printing of these volumes, and also of Nos. 41 and 42, to be the 
most pressing.” 
Extracts from Letter (27 th May 1907) received from Dr Ristenpart, 
Director of the Astronomical Bureau of the Prussian Academy. 
“ There is indeed no question that the work under consideration (its 
accuracy being assumed) possesses a high scientific value. So little has 
been done to calculate with logarithmic and trigonometrical functions to 
more than 7, 8, or 10 places, and the works with 10 figures are in the 
last places so frequently unreliable (as, for example, in the celebrated Opus 
Palatinum), that the possibility of a more severe control of existing works 
and an extension of their tables to still more significant figures would be 
of exceptional value. 
“ The preservation of the Tables by a public institution appears to me 
to be absolutely required, but it is not sufficient. An Index of the Tables 
should be published in the Transactions of this institution, and a revised 
copy of those Tables which are not to be printed should be preserved in 
a second institution to guard against the possible loss of the one copy 
through fire or other catastrophe. 
