392 
Scientific Intelligence . 
influence in causing the diminution which has been observed in 
its periodical time. — See Zach’s Corresp. Astron. vol. viii. p. 279* 
4. Observatory ofDorpat in Livonia . — This observatory, un- 
der the direction of M. Struve, an able and active astronomer, 
has been supplied, in the most handsome manner, with fine in- 
struments, by the Emperor of Russia, whose liberality to science 
deserves the highest encomiums. M. Frauenhofer of Munich 
has been occupied for two years in completing, for this observa- 
tory, an achromatic telescope, fourteen feet in focal length, and 
with an aperture of nine inches. “ You may judge from this,” 
says M. Struve, in a letter to Baron de Zach, “ how much our 
liberal government does for astronomy. Our observatory is par- 
ticularly indebted to the curator of our University, M. General 
Comte de Lieven, who has not only provided it with every thing 
that is excellent and perfect in the way of instruments, but has al- 
so built a commodious house for the astronomer. He has likewise 
ordered a great meridian circle, similar to that of Gottingen, Mu- 
nich, and Konigsberg ; a great repeating circle ; and an universal 
instrument, &c. all from the manufactory of MM. Reichenbach 
and Ertel of Munich.” — Zach’s Corres. Astron . vol. viii. p. 370. 
5. Measurement of a Degree in Livonia. — The liberality of 
the Russian Government has also been shewn, in charging M. 
Struve of Dorpat, with the measurement of a degree of the me- 
ridian, in Livonia. Properly speaking, this work is carried on 
by the University, out of the large funds which the Government 
has put at its disposal, for every purpose that is useful and in- 
teresting to science. M, Struve began his operations in the sum- 
mer -of 182$. 
6. Eclipse of the sun of 1th February 1823, observed at Bushy 
Heath. The end of this eclipse was observed by Colonel Beaufoy, 
at 17 h 44' 30".— Mean time at Bushy, in West Long. 1°20".93, 
and North Lat. 5U 37' 44" .3. 
7. Rev. Dr Pearson's Introduction to Practical Astronomy 
The Rev. W. Pearson, LL.D., Treasurer of the Astronomi- 
cal Society of London, has nearly finished printing a quarto vo- 
lume of astronomical tables, which will constitute Vol. I. of “ An 
Introduction to Practical Astronomy,” and which will save the 
practical astronomer much trouble, by facilitating the reductions 
