Early Logarithmic Tables. 375 



tion est tradvite dv latin en || Franqois, la premiere Table 

 augmentee, fy la seconde || composee par Adriaen Vlacq. || Diev 



NOVS A DONNE i/vSAGE DE LA VIE ET d'eN- || TENDEMENT, 

 PLVS QV'lL n'a FAIT || PAR LE TEMPS PASSE. || A GrOVDE, || Chez 



Pierre Rammasein. || M.DC. XXVIII. \\Avec Privilege des Estats 

 Generaux. 



Pages viii. (not paged) contain the title, Preface au Lec- 

 teur and Pautes a corriger (which is generally missing) ; sheets 

 a-g (pages 1-84) contain thirty chapters of explanation ; sheets 

 A-Kkk (720 pages not paged) contain Tafel der Logarithmi 

 voor de ghetallen van 1 af tot 100000 (this title, not the Prench 

 one in the copy at the British Museum, is that occurring in 

 Miller's edition); sheets Lll-Sss (96 pages not paged) contain 

 Canon Triangulorum sive tabula artificialium Sinuum, Tangen- 

 tium et Secantium, Ad Radium 10,00000,00000, et ad singula 

 scrupula Primi Quadrantis. It should be noticed that every 

 sheet contains 12 pages. 



My copy, as appears from a notice on one of the fly-leaves, 

 was changed on March 26, 1667, for the second volume of de 

 Decker's ( Nieuwe Telkonst;' so that it follows again that this 

 latter work was very scarce. 



Postscript. — I have found a further proof of the connexion 

 between Vlack and de Decker not having been loosened by the 

 former publishing his ' Arithmetica Logarithmica/ and thereby 

 forcing the latter to suppress his " great work," the second vo- 

 lume of the ' Nieuwe Telkonst.' 



The same de Decker gave, some years later, a treatise on 

 Navigation : — 



Practyck II vande Groote || Zee-vaert : || beschreven door || 

 Ezechiel de Decker, Reker-m r . \\ ende Lant-meter } residerende j| 

 tot Rotterdam. || Ter Govde. By Pieter Rammazeyn, 1631, 

 in octavo (small). 



This work contains sheets A-D (the title, dedication, preface, 

 and 60 pages not paged of introductory matter [" Verklaringhen 

 vande Tafels sinuum, tangentium ende secantium ; Handelingh 

 vande platte driehoecken ; Handelingh van de spherische drye- 

 hoecken] ") ; sheets &-df " Canones Sinuum, Tangentium et Se- 

 cantium. Ofte Tafel van Hoeck-maten, Raeck-lijnen, ende Snij- 

 lijnen, den Radius zijnde 100000" (92 pages not paged; the 

 tables proceed by 1' and give 10 decimal-places; as to the loga- 

 rithms, there is mentioned at the last page the Nieuwe Telkonst 

 in octavo); sheets C-Dd contain some explanations, and then 

 Chapters I. to IX. of the Navigation (pages 1-804, where the 

 last page bears the erroneous superscription "Achste Hooft- 

 stuck"); finally the Almanachs for 1631 to 1640 (pages 305- 

 314), an Appendix [By-Hangsel] with nine Astronomical ques- 



