User:Yeulefan4l/Thomas Grubb

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Thomas started out in 1830 in Dublin as a metal billiard-table manufacturer. He diversified into making telescopes and erected a public observatory near his factory at 1 Upper Charlemont Street, Portobello, Dublin. As makers of some of the largest and best-known telescopes of the Victorian era, the company was at the forefront of optical and mechanical engineering. His innovations for large telescopes included clock-driven polar mounts, whiffletree mirror mounting cells and Cassegrain reflector optics. Later, the manufacturing firm changed its name to Grubb-Parsons in 1925.

Grubb helped build the famous telescope for William Parsons, 3rd Earl of Rosse, at Parsonstown (now known as Birr), County Offaly, Ireland. One of his earliest instruments - the telescope for Markree Observatory in County Sligo in the West of Ireland, supplied in 1834 - was, until 1839, the largest refracting telescope in the world. It was used to sketch Halley's comet in 1835 and to view the solar eclipse of 15 May 1836.

My article additions:

Thomas Grubb's reputation as a competent telescope maker began to spread as he offered his talents to the Irish astronomical community. Grubb first met the director of Armagh Observatory, Romney Robinson, sometime in the 1830s. His first commission was for E.J. Cooper of Markree Observatory. He was tasked to mount a 13.3 inch lens which was used to view the solar eclipse of 15 May 1836.

- From PDF (add sources!!)


 * Thomas Grubb's company also made various scientific devices for Trinity College in Dublin. In 1839, his company made about twenty sets of magnetometers.
 * These magnetometers were requested by Professor Humphrey Lloyd who was very involved with Grubb's work. He sought Grubb's talents because so he could be close to the creation process and supervise his work.


 * Starting from 1840, Grubb also worked as an engineer for the Bank of Ireland. He was responsible for designing machines used in the creation of banknotes. These machines were used for engraving, printing and numbering the banknotes.


 * Grubb made a contract with the government of Ireland in 1866 to construct a telescope that would be sent to the southern hemisphere for use to compare the sky from there. This project was a failure. He was tasked of constructing a Cassegrain reflector that would include two 4-foot metal mirrors. The problem with the project was Grubb's choice of metal. This caused defects in the form of the astronomers in Melbourne being unable to to repolish the mirrors adequately.

- Science and Irish Culture


 * 1916 is specific year that Howard Grubb took over the manufactory. (p.45)
 * Link pdf talk about war effort to p. 45 in here.
 * the factory which was critical to the war efforts of the allies was placed under military control after 1916.
 * in 1918, the factory was moved to St. Albans, England for concerns that it would be vulnerable in Ireland.
 * This was compounded by the 1916 Rising.
 * link wiki article of this.

- Physicists of Ireland Passion and Precision


 * p. 72 noted that in 1837 James MacCullagh and Grubb worked together in experiments on metallic reflection.
 * do more research.
 * p.131 mentioned that Thomas and Howard made a spectrocope that Stonely and Reynolds used to measure the angular deviations of 31 of the 106 lines observed in the spectrum of chromyl chloride.
 * this talks about simple harmonic rastios and harmonic series.
 * link wikipidiea article to this.
 * do more research.
 * Thomas grubb constructed most of the instruments used in the observatory that was built at Trinity College Dublin (1837-1838) for Humphrey Lloyd.
 * p.54 mentions that Grubb's work at Markee marked a major milestone in the use of massive telescope.
 * p.53 mentions Grubb and Romney Robinson together.
 * Their families had many connection.
 * Marry Ann Grub married Romney's nephew Romney Rambaut.
 * Robinson's daughter married GG Stokes.
 * Robinson asked Grubb go mount a 10-inch mirror for Armagh Observatory (p.55).

My response to my peers:


 * I will definitely add more sources, namely to the last four sentences.
 * I see that the links for source 2 and source 5 do not work as intended. I will work on making amends.
 * The recommendation to add headings is a great idea and I will definitely implement that.
 * I like the idea to talk about Grubb and Romney Robinson together. I will do more research into their collaborations and also look into your other addition recommendations.
 * I did not add page numbers for the information I got from each book. I will definitely fix that.