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A29000 New experiments, and observations, made upon the icy noctiluca imparted in a letter to a friend living in the country : to which is annexed A chymical paradox / by Robert Boyle. Boyle, Robert, 1627-1691. 1682 (1682) Wing B3995; ESTC R13447 46,156 165

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with cold and accordingly I found that the Impregnated Spirit of Wine produced rather a greater than a lesser Light in hot Water than it had done in cold One of my designs I had in making this Experiment being to examine a conjecture I had made about the great diffusedness of the Noctilucal Matter the subtilty of whose Particles made me think they were not to be judged absent where ever they were not numerous or agitated enough to be of themselves Visible this I say being in my thoughts I judg'd it not fit to put our Splendent Icy Matter into the Spirit of Wine at adventures Wherefore having in a very good Ballance weighed out one Grain of our Noctiluca first wiped dry we put to it at several times that it might the better dissolve above two thousand Grains of Spirit of Wine that would burn all away and yet which may seem strange this small quantity of Noctilucal Matter did so Impregnate all the Liquor put upon it that though nothing of Luminous did appear in the Menstruum nor in any Exhalations rising from it though the Phial were unstopped or the Liquor poured out of it into the Air yet as soon as ever 't was dropt into common Water there would be produced a Vivid Apparition of Light such as has been a little above described It seemed not very improbable that these suddain and vanishing flashes might at least in great part proceed from the quick disingagement and extrusion of the Noctilucal Particles made by the Water which diluting the Vinous Spirit disabled them from retaining with them the Luciferous Corpuscles As if into one Ounce of high rectified Spirit of Wine you put half a Dram or a Dram of Camphire the Liquor will dissolve it without being thereby manifestly altered as to Colour or Transparency but if you drop this solution into common Water the Vinous Spirits will immediately diffuse themselves into the Liquor and let go the Corpuscles of the Camphire which will Float like a White Powder upon the Surface of the Water To this Conjecture is agreeable what upon Tryal we Observed with our Impregnated Spirit of Wine namely that being dropt into other well Deflegmed Spirit of Wine we saw no Light produced but when it was dropt into an Urinous Spirit of Sal Armoniac which seems to consist of the Volatile Salt dissolved in the Phlegm or Aqueous Liquor the Noctilucal Corpuscles by this Waterish part were freed from the Vinous Spirits almost as much as they would have been by common Water and did accordingly shine with much briskness EXPERIMENTS Discovering a Strange SUBTILTY Of parts in the GLACIAL NOCTILUCA SECT VIII BUT what has been above recited is not all that I thought fit to try with the shining Matter that I told you we dissolved in Spirt of Wine for after having as I lately recited brought one Grain to Impregnate between four and five Ounces of Alcohol as the Chymists call the high Rectified Spirit of Wine which did at least two thousand times exceed the weight of the Noctilucal Matter I presum'd that this very parcel of Spirit of Wine wherein the shining Matter was already diffused and scattered into so many thousand Corpuscles as sufficed to Impregnate all the Liquor would yet communicate to a good quantity of Water Particles enough to make it shine when agitated wherefore when we had weighed out in a very trusty Ballance one Dram of our Impregnated Spirit of Wine we mixed it with and shook it in as much fair Water as we thought fit but not all at once that is till we had to our Dram of Spirit of Wine put above fifty times its weight of Water and that Alcohol it self weighing at least two thousand times as much as the Noctilucal Matter that Impregnated it it follows though it may seem strange it should be true that the single Grain of Icy Noctiluca was able to Diffuse it self through and Impregnate full a hundred thousand Grains of Liquor so as when duly ordered to make it Luminous For having presently after the last Water was put into the Glass stopt the Vessel Close with a good Cork and shaken it a little in a dark place the whole Phial appeared to be full of Light which though it were not more than ordinary intense yet by reason of the Bulk of the Liquor made a glorious shew and discovered divers of the Neighbouring Objects And after we had done shaking that Phial not only the upper part which was fill'd with Exhalations and Vapours shined like those other Liquid Phosphorusses formerly mentioned but what was not observed in Them the Water it self had a Luminousness though of an inferiour degree of its whole Mass which yet will not keep me from thinking of some expedient that may satisfie those who may suspect as I did that some of this Light proceeded from the Exhalations that shined through that Diaphanous Water though this did not seem the only nor perhaps the chief cause of its appearing Luminous since when the Glass was shaken the whole Mass of the Liquor appeared to shine so that we could plainly see through the sides of the Vessel the Conical Figure of its bottom After this I prosecuted the Experiment a good way further encreasing the proportion of the Water to fresh Impregnated Spirit and I found what perhaps you will think strange that one part of the Noctiluca being first dissolved in Alcohol of Wine and afterwards briskly shaken into a convenient quantity of Water rendred Luminous as much Liquor as upon Calculation amounted to four hundred thousand times its Weight And this did not seem to proceed from the Irradiation of the Luminous Corpuscles or Exhalations shining in the empty space at the top of the Glass because the Phial was so near fill'd with Liquor that there was but little room left for Vapours and because also the Vapours that did play in that space shined but very faintly and when the Glass was at rest much less than a minute of an hour the Light would reach but a little way downwards in the Water and yet was there so dim as to be scarce discernable Whereas in our Experiment not only the agitated Liquor appeared Luminous throughout but the Light was brisk enough insomuch that the Conical Figure of the bottom of the Glass was clearly visible by the help of it But lest some should think that if this Experiment had been further and further prosecuted the Luminousness would have still extended to greater and greater quantities of Water I shall add that when I encreased the proportion of this Liquor to the Noctilucal Matter to be dispersed through it by putting in near three or four ounces of Water more than I guessed would be convenient the Luminous Matter seemed to be as it were drowned or lost in so much Liquor for though we gave it much more agitation than had in the former Experiments been needful to produce Light yet no Luminousness at all appeared in the mixture Wherefore