His mathematician and astronomical learning was noted. He became a Fellow of the Royal Society in 1796. Three years later (1799), he was awarded the Copley Medal largely for his paper on computing the perturbations of planets.[3]
He supervised the translation from Italian of the Instituzioni analitiche ad uso della gioventù italianabyMaria Gaetana Agnesi, which was published in 1801 by Taylor and Wilks, London as Analytical Institutions in Four Books[7]
The Gentleman's Magazine in 1828,[8] printed the eulogy on Hellins's life and achievements, given at a meeting of the Royal Society, by Davies Gilbert, its president:
One of those extraordinary men, who, deprived of early advantages, have elevated themselves, by the force of genius of industry, to a level above most persons blessed with regular education.
In 1787 he edited The Young Algebracist's Companion. In 1788, he published Mathematical Essays, on several subjects and in 1802 in two volumes, The Analytical Institutions, originally written in Italian, by Maria Gaetana Agnesi, translated by John Colson. Taking orders, Hellins was for some time curate of Constantine in Cornwall and, afterwards, of Greens Norton, Northamptonshire, but in 1790 he was presented by the Earl Bathurst to the vicarage of Potterspury in Northamptonshire. He was elected a Fellow of the Royal Society in 1796, and in 1800 took the degree of BD at Trinity College, Cambridge.
Hellins at one time computed the Nautical Almanac. He later assisted at Greenwich and, furnished William Windham with calculations and tables on which to base his new military system, as Minister of War, in 1806.
Hellins applied himself also branches of pure mathematics. Nine communications from him appeared in the Philosophical Transactions:
On the summation of series.
On the conversion of slowly-converging series into others of swifter convergency.
On their application to the calculation of logarithms, and to the verifying of circular area.
On the roots of equations.
And in 1798,
On method of computing with increased facility the planetary perturbations.
For the last he was honoured with the Copley Medal.
Mr. Hellins also occasionally furnished Mathematical articles to the British Critic,[9] from the year 1795 to 1814. They included:
On Mr. Wales'[10] Method of finding the Longitude, Vol. 6. p. 413.
OnBishop Horsley's Mathematical Treatises, Vol. 21. p. 272.
On Donna Agnesi's Analytical Institutions, of which he superintended the publication, Vol. 23. p. 143; Vol. 24. p. 653 ; and 25. p. 141.
OnF. Baily's work, on the Doctrine of Interest and Annuities, Vol. 38. p. 622, and Vol. 43. p. 502.
When the first series of the British Critic closed,[12] the connection with Hellins with the work is supposed to have ceased.
Hellins retired to the small living of Pottersbury in Northamptonshire. He married Miss Anne Brock, a Devonshire lady, who survived him but a short time, and by whom he left an only son, William.
He died in Potterspury 5 April 1827, leaving one son (William Brock Hellins) by his wife Anne.[3] In the North Aisle of the parish church of St. Nicholas is a small tablet of white marble, inscribed:[13][14]
In Memory of
The REVD. JOHN HELLINS, B.D. & F.R.S.
upwards of 36 years Vicar of this parish, who died April 5th 1827
aged 78 years.
of ANNE HELLINS his widow, who died June 3rd 1827. Aged 72.
^John Hellins, 1829–87, clergyman and entomologist: Darwin correspondence project databaseArchived 27 September 2007 at the Wayback Machine, which lists this Hellins as one of Charles Darwin's correspondents. It is apparent that the two John Hellins were related, the first being the grandfather of the second. John Hellins b 1749 (wife Anne Brock) was vicar of Potterspury Northants, where one William Brock Hellins, also to become a clerk in holy orders, was born in 1798. John Hellins the entomologist was William's son, born in Bow, Devon c1829 (info taken from GRO vital records www.freebmd.org.uk, and census records for 1841–1851).
^. An early scientific paper was: "Theorems for Computing Logarithms." By the Rev. John Hellins; Communicated by the Rev. Nevil Maskelyne, D. D., F. R. S. and Astronomer Royal,in Philosophical Transactions Series I,(1780), volume 70, pages 307–317 [Referred to by Smithsonian/NASA ADS Astronomy Abstract Service.
^A digitised scan of the Analytical Institutions is available at Google Books. Hellins signs the Editor's Advertisement 29 September 1801, Potter's-Pury.
^The Gentleman's Magazine 1828, Volume 98 (New series No. 21) page 181 (Obituary section).
^The British Critic: A conservative review journal, launched in 1793. See ODNB article: 'Beloe, William (1758–1817)’
^William Wales: see ODNB article: 'Wales, William (bap. 1734, d. 1798)’.
^Thomas Keith see ODNB article 'Keith, Thomas (bap. 1759, d. 1824)'
^The first series of the British Critic closed in 1813.
John Hellins: R. E. Anderson, 'Hellins, John (d. 1827)’, rev. Adrian Rice,Link to article in ODNB accessed 30 May 2007.
William Wales: E. I. Carlyle, 'Wales, William (bap. 1734, d. 1798)’, rev. Derek Howse, Link to article in ODNB accessed 20 August 2007
Thomas Keith: W. A. J. Archbold, 'Keith, Thomas (bap. 1759, d. 1824)’, rev. Ruth Wallis, Link to article in ODNB, accessed 20 August 2007
William Beloe: Antonia Forster, 'Beloe, William (1758–1817)’, Link to article in ODNB accessed 21 August 2007. Beloe was one of the proprietors of The British Critic.
