26 



9. From H. Cook, Esq., Fac-Similes of the Warrants for the Execution of 

 Mary Queen of Scots (1587), and of Charles I. (1648) ; also one of 

 the "Act for establishing the Coronation Oath" (1689), and a Col- 

 lection of Bulletins of the French army, 1812 and 1815. 



The various items in this presentation were carefully examined by the 

 Fellows present. Some of the bulletins, that for instance of the 16th 

 June, 1815, and others, are of great historical interest. The warrants with 

 the signatures attached are also well worthy of notice by the student of 

 English History. 



The Secretary then read the communication from Mr. Biggs, referred 

 to at the previous meeting. 



This was a detailed description" Of a Method of Microscopic Measure- 

 ment," by means, — 1st of a Camera Lucida of Mr. Bigg's own contri- 

 vance ; and 2nd, of a movable scale of inches placed at such a distance 

 that the reflected image of the object is projected upon it, and made to 

 correspond with one or more of the divisions, the value of which has been 

 previously ascertained by means of a stage micrometer graduated to, say — 

 1-100 or 1-1000 inch, and applied in the same manner as described for the 

 object. 



In the absence of Mr. Biggs it was difficult to illustrate the various 

 details given in the paper, the Society's microscope not being adapted for 

 the particular kind of camera required. It was hoped that on a future 

 occasion Mr. Biggs would bo enabled to exhibit his method with his own 

 instrument and appliances. 



After reading the above paper. Dr. Agnew exhibited modes of minute 

 measurement by means of English and French micrometers. 



Mr. Allport brought forward a photograph of an interesting fossil ripple 

 mark, which has been exposed in the working of a quarry at the com- 

 mencement of the new Huon road, where it leaves Holbrook Place. The 

 rocks in which it occurs belong to the carboniferous series, and the for- 

 mation of this particular mark was doubtless due to the same natural 

 causes which now affect mud-banks occasionally covered with water. 

 The mud on which this mark was left by the receding waves must have 

 had time to get quite hard (probably under the influence of a hot sun) 

 before the next deposit of mud upon its surface, leaving a natural division 

 between the two deposits, now plainly visible after the lapse of countless 



es. 



The usual votes of thanks having been passed, the meeting separated. 



