7be VUnet.of Olbers. 1 85 



the temperature of 70** of Fahrenheit. Of thrte ^uh]>i&.s in- 

 ocublod with this diluted matter, two took the difeafe in the 

 ufual wav. The remaining third was inoculated in each arm 

 ■with one puncture with this diluted matter, and alfo in ei'ch 

 arm, in like manner, with undiluted cow-pock matter ; 'but all 

 thele four punctures failed to produce the vaccine difeafe, tlic 

 fubjecl being an adult, and probably had had the fmall-pox. 



Letters from Baflora of the 17th of June, from S. INTaircny, 

 theJiriti{h coniul at that place, and Dr. Milne, phyiician to 

 the fadorv, addrefled to Dr. De Carro, of Vienna, confirm 

 the happv refuh of the vaccine inoculation, which lias been 

 introduced into feveral parts of tlie Eaft by the zeal of Dr. 

 Carro. This beneficial praAice has been introduced not 

 onlv at Bagdad but alfo at Balfora. At the latter the con- 

 fulTet the lirft example by caufing his own fon to be inocu- 

 lated; and from the end of Apnl to the 17th of June the 

 operation had been performed on forty fubjevSs with the 

 heft fuccefs. Dr. Milne inoculated not only the failors on 

 board fome fliips defiined for Bombay, but liipplicd a mer- 

 chant who was travelling to Mafcate with vaccine matter for 

 that diftrict. 



THE PLANET OF OLBERS. 



Circum (lances have been much more favourable for deter- 

 mining the orbit of this planet than for that of Piazzi, an 

 arc four times as larsre. A great number of obfervations 

 made during fix months, with great exadnefs, notwithitand- 

 ing the difficultv of obferving To faint an objpi^t, and an in- 

 clination of orbit much more confidcrable, give more pre- 

 eidon to the refults of calculation. 



C Mechain and Meflier obfcrved this planet till the mid- 

 dle of the month of Auguft ; the former, with a ttlefcope 

 which was not even mounted on a parallai^Lic machine, 

 which greatly increafes the difiicultv of obfcrvalion. The 

 comet which C Mechain then difcovered having obliged 

 him to interrupt his obfervaiinns, C. Mefiicr continued to 

 otjferve it alone till the 24th of September: he even tried to 

 obfcrve it on the .6th of October; bui the vicinity of the 

 horizon, ami particularly the Imoke of the chinincvs which 

 furruuiuied the obiervatory, rendered the obfcrvation too un- 

 »-ertain to be turned to anv \.\^^. All thefe oblervations agree 

 with an uncommon pneiiion, and lar fupeiior to what could 

 have been expefted from an ecjualorial fcdor ; C^ Lalandc 

 having foimd the dilfcrenee of 30" in two conlceulive 

 i)!)fervalions of Mercury made with a large equatorial fcch)r 

 bv an aljle aftrononier : it appcafs alio that this planet has no 

 'A here bceji oblerved fo long as at Paris. 



I liuvc 



