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MINUTES OE PROCEEDINGS OE 
application to tlie solution of integrals by approximation, but those 
who are possessed of sufficient mathematical knowledge to enter upon 
this will need no further assistance. 
In conclusion, the writer begs to offer some extracts, with remarks, 
which have been made by a friend from the writings of the famous 
Russian General Mayevski—who has contributed so much to artillery 
science. 
The information supplied by the following extracts may be of interest to the 
artillerist:— 
General Mayevski was appointed Professor of Ballistics to the Russian Academy 
of Artillery in 1858. He made much use of General Didion’s “Traite de 
Balistique ” in composing his own work on that subject, which was published in 
1870 in the Russian language at the expense of the state. A translation into 
French of the more important chapters of the work was printed in St. Petersburg, 
and published in Paris in 1872. 
General Mayevski observes :—" La description des experiences sur la resistance 
de Pair au mouvement des corps animes de faibles vitesses, ainsi que des experiences 
faites en 1840 sur la resistance de Pair au mouvement des projectiles a ete tiree du 
traite de M. Didion. Les resultats des experiences faites par M. Baskforth en 
Angleterre sur les projectiles oblongs out ete deduits des donnees inserees dans les 
Proceedings of the Royal Artillery Institution, Woolwich, 1868.”—Preface p. vi. 
And again :—“ Aussi pour completer les donnees se rapportant aux projectiles de 
forts calibres nous avons profite des tableaux des vitesses decroissantes deduites 
par M. Bashforth de ses experiences faites en 1868 au moyen de son chronographe; 
ces tableaux comprennent les vitesses de 518 m:s a 28S m:s (1700 f.s. to 928 f.s.) qui 
correspondent aux trajets de 805 en 3050 metres des projectiles oblongs de 178 mra , 
203 mm , et 229 mm , et qui sont obtenues pour le cas ou le mouvement des projectiles 
peut etre considere comme rectiligne. Nous avons calcule d’apres les resultats in- 
seres dans ces tableaux les valeurs de la resistance correspondantes a differentes 
vitesses.”—p. 58. 
Reference is here made to some results communicated to the Royal Artillery 
Institution by Captain Ford, R.A., and published in “ Short Notes ” for October, 
1868, pp. 69, 70, in the form of tables showing the velocities of the service shot 
for 9-in., 8-in., and 7-in. M.L. rifled guns at intervals of 100 ft., &c. From these 
it was easy to deduce the values of M. Didion’s p. The reports in full of the 
experiments made with the Bashforth chronograph were not published till late 
in 1870. 
Respecting the law of the resistance of the air to elongated projectiles, 
Mr. Bashforth observed that ‘ ‘ for ogival-headed, elongated shot, the resistance of 
the air may be considered to vary roughly as the sixth power of the velocity for 
velocities 900-1100 f.s., to vary as the third power for velocities 1100-1350 f.s,, 
and to vary as the second power for velocities above 1350 f.s.”— Tables of Remaining 
Velocity, <^c., p. 21 (1871), and Proceedings of the R.A. Institution , p. 367 (for 
Sept. 1871). 
This may be compared with General Mayevski’s conclusions, stated in his 
Preface, p. vi.:—“ A fin que les expressions de la resistance represented, avec une 
approximation sufhsante, les resultats de nos experiences et ceux des experiences 
anglaises, faites avec des appareils perfectionnes, et que ces expressions permettent 
en meme temps une integration facile, quoique par approximation, des equations 
differentielles du mouvement, nous avons admis pour les projectiles spherigues . 
