410 
BAUER. 
both in the Variation and Dip of Magnetick Needles, in No. 383 of the 
Philosophical Transactions, and this as far as half or two-thirds of a De¬ 
gree, if not sometimes of a whole Degree (which last Quantity I once 
observ’d myself in a Dipping Needle of my own, of almost four Feet 
long, in the Space of Eight Hours) I perceived that all my Labour was 
in vain, and! was obliged to drop that Design intirely. 
Vol. I, pages 315-16 : In the same Year 1724, I published the Calcula¬ 
tion of Solar Eclipses without Parallaxes; with the Discovery of the Geo¬ 
graphical Longitude of Places by such Eclipses. And an Account of some 
Observations made with Dipping Needles, 8vo. Price Is. 6d 
N. B.—This Book has so many Mistakes, that ’till they are corrected I 
do not desire to have it spread abroad any longer. I am myself now too 
old to take Pains in the Review ; And as I have heard Sir Isaac Newton 
say, that no old Men (excepting Dr. Wallis) love Mathematicks; I so may 
well be excused here, especially when I have been long so busy about 
Things of much greater Consequence. 
On examining Whiston’s work of 1724,1 find some infor¬ 
mation as to the dip at Boston, U. S. A., in 1722, and with 
this I can extend the secular curve for Boston back to that 
date. 
L. A. B. 
Friedenau, bei Berlin, November 13, 1894. 
