ADDITIONAL CORRIGENDA, VOL. II. 



lt* .nU.eBrf "and clear 



Pf*M. UM !.> "Pnuno r-rf 1'unUno. 



PC. UM ./r "dcbf rW "dghtoen." 



ADDITIONAL CORRIGENDA, VOL. VI. 



Introduction. page xiv 



JW * (A + V) = 11. JIMtO" rent log tang 4 (A + V) = 11. 318420." 



Ar -4 (A V)= 10. 17 rW "log tang 4 (A V) 10. 216726, ' and dab "toy" in two placet below. 

 Page XJUT, lines time, two, MM! one, from bottom, should read 



-- = .09005339 log 5. 7275037 



1-^=1.00000706 



" -8-oo ~ "IT 



xrr, line U. ihoold nwl 



= .0000054 log. 4.7380296 



2. 3087424 



utd Ait MRB = oo pge* UUT and XXT, between the namben and their log. 



Pt ssTit. I bare atld of the In. HnomeUr : It U a modiBcatlOD, by Prof. Kreil and Dr. Lloyd, of the circle devised 

 by OMH*." I WM led to thb by the following language in a brief notice of these iiwtruments published, page 4 of the 



, *r., by Otpt. C. J. D. KMM. R. A. London, 1846." " A new dip-circle, to be used 



with imflag mlcroacopm, DM been derived by M. Gaoat, and conctructed, with modificationa, by H. Kreil and Dr. Lloyd, 

 It U tatl oa page XZTI of thb Tolame that the magnetic*! and a portion of the meteorological instruments for the 

 wct maHe onder the direction of Col. (now General) SaUne, to whon earnest interest and assistance we are 

 the RTeatoit obUgitlonsi. This distinguished pbysicbt informs me, Prof. Gaoss never devised a dip-circle, and that 

 Ike only Instrument aeed by bin wan made by BoMoson, with a 9-inch needle and single reading lens. The application of 

 rernicn aod microscope*, and UM shortening of the needle permitted thereby, was a suggestion of Dr. Lloyd. Gauss never 

 saw and probably never beard of one of the latter Instrument*, nor did Prof. Kreil ever see one until the summer of the 

 rear 1M7, when a set of magnetic instrument*, prepared at the request of the Austrian government, tinder the direction of 

 Ocn. aabine, was forwarded by the Utter to Vienna. 



