lviii 
REPORT-1854. 
the science are promoted as well by private enterprise as by the aid of 
Governments. 
“Cambridge Observatory, Sept. 14 , 1854 .’' “ J. ChALLIS." 
You will have observed that Prof. Challis speaks of the activity of private 
enterprise in the cause of astronomy, and can I in this place paw over tit 
labours of a Lassc-lls, or the enlightened public spirit of the corporation of 
this town, which, stimulated by your visit ill tho year 1*37, has now foriorne 
years maintained an excellent and well-provided observatory, under the able 
management of Mr. Hartnup, who lias not only conferred great benefits on 
the navigation of the place by the regulation of its chronometers, but great 
lonour upon the institution by the* general services which he has rendered 
to meteorological, as well as astronomical science ? Mr. Hartnups improve- 
men & in the chronometer, by which the errors arising from variations of 
temperature are either corrected or estimated and allowed for, have been of 
A l ?,!!, 0 r a, r*. 1,1 ,he wonl6 of a Report of the Council of the Royal 
win nnnlv'tTo “ Jt is ,0ll,ul experimentally, that when a captain 
nometei” i 16 ^ 6 - < ’°\ Te ®^ *’ or temperature, the performance of chro- 
ri,l; ( !| h improved ; and in regard to the importance of the subject 
further? «t£ ,nterest! ? navigation. I would take the liberty of quoting 
but loss from fi°r e mks !,t sca ’ H S ninst which no foresight, can provide; 
treated asTcrS 1 ^ co, apassos or *ll-iwgulated chronometers should be 
efficacy of both Him* 1 ’ 10 * co,,imon sen8e ar >d common care will secure the 
to a lLge amou t * l '* !° be ^ that W* 
knowledge and a small i>« Car ^ 8acnfico(l f° r a want of n little eleme ntary 
neglect the safeguards ° f ° ur —* 
■with°Governmein V'ere h?* ** the P? ricxJ of your last fleeting,arrangements 
scope of four-feet merinrn^ r ?® , ? Sfi / 0r i tbc construction ol * reflecting tele- 
other Starry phamoniena of m,!> C ' 8l ‘ oultJ brin ff b> bear upon the nebula* and 
that to which thev lnd I 80, ‘thern hemisphere a far higher power than 
hy Sir John Ilerfchel. You will 
‘tout, it has not vet | 1P !5! , L . e f t ‘ mate Wils not objected to bv the Govern- 
aUowanee hr rhe J- eo r| ia, U cn(. Wc must make sow 
,‘ e . a , b " u . 1 ' 8 -v»ur Kcw Commit: 
of obsorvatiiiii,_ltJi (! tltermiuni.Lf'.l. ’■’t —J t,J .we 'annus 
measures,—^, y are d - I ® ;, ,ar ? meter » ™d tho standard weight 
general j tl this and in other enuntri **' °[ "‘calculable benefit to science in 
hand, f«r verification and ad l l^ t,,is ,,lomcnt they have in their 
mete s fur t , le navy 0 f the D„C Jl000 thermometers and 50 ban,- 
8unnHpH ,neter3 ior our own liuarr! 'nf*'r %S ? ve ^ aa 5()f) thermometers and 
e\tranrfi- m or ' , ‘ nar y commerce L;„„ J ,at,e > the instruments which are 
also uniw? At thTauS± Un ‘* to ** object to error to an 
annea.-m ( 'i ak r ,1, 1 Uy thc photogranififnl ° Sir Johl > Hcrschel, they have 
of the snots ? 1 ,e . Sun ’ 3 disc,“with a vb>I° S9 i- to secnre a daily record of the 
tion cun b 0 P° l n , ,t 1 8 SRrfaco, their nlaces ' ° ascortainin g» by a comparison 
Council of tbe a R l8he , d bet ' v °cn their variat!^ and / ornia > whether any rela- 
ia course o/ tn 2' ***** tlM pS S «ad other phenomena! The 
completion. Thc W ed tl e funds, and the instrument fr 
' Deuut,< ul invention, which seems likely 
