MARINE BAROMETER. 



give a spark. But the dark green glass of which wine 

 bottles are made, when by exposure to air and moisture, or 

 under other circumstances which may enable it to reflect the 

 prismatic colours with brilliancy, is capable of giving a 

 spark, and emitting light, after the electric explosion has 

 been made aboFc its surface. 



Strontian Genus. 

 Native Carbonate of Strontites, instead of a spark, gave stronfjau 

 only a hissing purple stream, but was very luminous by the genii*. 

 explosion. 



I remain, 



Your's, &c. 



W. SKRIMSHIRE, Jux. 



V. 



Observations upon the Marine Barometer^ made during the 

 Examination of the Coasts of New Holland and Nezo 

 South Wales, in the Years 1801, 1802, and 1803. Bi/ 

 Matthew Flinders, Esq. Commander of his Majesti/'s 

 Ship Investigator, hi a Letter to the Right Hon. Sir 

 Joseph Banks, Bart. K.B. F.R.S. S)C. S^c. <^c. Fro?n 

 Philosophical Transactions for 1806. 



lor 



Isle of France, Aug. 19, 1805. 



A 



FORE-KNOWLEDGE of the wind and weather is an ^^^^^ ^^^^^_ 

 object so very interesting to all classes of men, and the tages of a fore- 

 changes in the mercurial barometer alfordin^ the means kn'^^^lcdge of 



^ ^ the weather. 



which appear most conducive to it, a system that should The barometer 

 with certainty explain the connection between the variations iadicates it. 

 of the mercury and those in the atmosphere under all cir- 

 cumstances, becomes greo-jy desirable ; to seamen, more 

 especially, whose safety and success ^cpernl so much upon 

 being duly prepared for changes of wind, and the approach- 

 ing storm, it would bean acquisition of the 6rst importance: 

 in a more extended view, I may say, that the patriot and the 

 philanthropist must join with the philosopher and the mari- 

 ner in desiring its completion. So long and widely-extended 

 ■a course of observation, however, seems requisite to form 

 K 2 even 



