12 s. vm. JAN. 15, 1921.] NOTES AND QUERIES. 47 Captains Captain Lieutenant JLieutenants Colonel St. George's Regiment of Foot (continued). Robert Johnston James Gendrault John Vickars (4) Anthony Meyrac (5) . . Cromwell Ward John Price Francis Boussilliere . . Arthur Horseman (6) John Williams (7) Robert Cambie Robert Hart Christopher Turner . . Homer Maxwell William Lockhart Lewis Bouchetiere James Ash Daniel Robertson John Vickars (8) John Beckwith (9) Talbot William Keene Elex. Trapeau Richard King Richard St. George . . Bolton Barrington Walter Johnston Thomas Dalton Ensigns Dates pf their present commissions. , . 25 June 1722 5 July 1725 . 26 June 1730 1 Aug. 1733 . 26 Aug. 1737 . 28 ditto . 31 Aug. 1739 . 31 Aug. 1739 . 25 June 1722 . 24 Nov. ditto . 17 Apr. 1732 1 Aug. 1733 . 23 Jan. 1735 . 14 Feb. ditto . 16 Jan. 1736 . 26 Aug. 1737 . 28 ditto . 19 Apr. 1731 1 June 1733 . 14 Feb. 1735 . 23 Feb. 1735/6 . 26 Aug. 1737 . 28 ditto . 27 Feb. 1737/8 ditto Dates of their first commissions. Lieutenant 28 Sept, 1706. Captain 29 July 1715. Ensign 14 Feb. 1701/2 ditto 22 Sept, 1722. ditto 28 Aug. 1708. Lieutenant 18 Aug. 1708, Ensign 10 May 1718. ditto 9 Jan. 1719. ditto 9 June 1721. ditto 6 Apr. 1709. ditto 3 Feb. 1722. ditto 18 Oct. 1705. ditto 26 Jan. 1730. ditto 20 May 1732. ditto 5 Apr. 1723. ditto 8 May 1727. ditto 1 July 1727. Ensign, 10 Mar. 1710. ..31 Aug. 1739 The following additional names are entered in ink in the interleaf : Captain .. .. Lewis Marcell 13 Mar. 1740/1 ,-; /-Thomas Parsons .. 23 Apr. 1740
- | Henry Jackson .. .. 1 July ditto
(4) Died in 1769. See obituary notice in The Gentleman's Magazine. (5) Major, May 27, 1745. (6) Captain, July 1, 1740. (7) Captain-Lieutenant, July 1, 1740. (8) Lieutenant, Apr. 23, 1740. <9) Lieutenant, July 1, 1740 ; Captain, 12 Dec. 1746. J. H. LESLIE, Lieut. -Colonel (Retired List). (To be continued.) THE GEOPHONE. The geophone is one of the many devices which, developed under "the strenuous demands of war, now con- stitute permanent additions to our indus- trial equipment in peace time. It is a listening instrument invented for detecting enemy activities in sapping and min ng and for locating artillery. It is now being used by the U.S. Bureau of Mines for locating miners who have been entombed. Although quite small it- is essentially a seismograph, working on the same principle as the pon- derous apparatus which records earth-quake tremours. In connexion with this subject we are told in an American mining paper that Herodotus, describes the method by which opposing armies, in one case at least, detected the presence of the other's mines. The device employed may be considered the forerunner of the modern geophone. He says : " The Persians beleaguered Barca for nine months, in the course of which they dug several mints from their own lines to the walls. But their mines were discoveied by a man who was a worker in brass, who went with a brazen shield all round the fortress and laid it on the ground inside the city. In other places the shield, when he laid it down, was quite dumb ; but where the ground was under- mined, there the brass of the shield rang. Such was the way in which the mines were discovered." The translation is not faultless, but will serve our present purpose. The original text is given in Herodotus ('Hist. Libr.,' iv. 200 (2)) on page 238 of the Dindorfian edition. The siege of Barke (circa 512 B.C.) is mentioned also by JEneas, the Tactician ( ' Poliorceticus, ' chap, xxxvii.), who gives the name of the besieger as Amasis. L. L. K.
