Hardwicke's science-gossip : an illustrated medium of interchange and gossip for students and lovers of nature . Fig. 66. Damaged Scale of Morpho , \ objective,with Smith & Becks patent illuminator. are rendered much more distinct, and appearancesare presented which are quite novel. The best lightis a narrow flame, obtainable by turning the lampround, a small condenser at the proper distancebetween it and the aperture in the side of the illu-minator, being interposed, to modify it. The objectsshould be mounted on dead-black paper and un-covered, and the object-glass accurately adjust
Hardwicke's science-gossip : an illustrated medium of interchange and gossip for students and lovers of nature . Fig. 66. Damaged Scale of Morpho , \ objective,with Smith & Becks patent illuminator. are rendered much more distinct, and appearancesare presented which are quite novel. The best lightis a narrow flame, obtainable by turning the lampround, a small condenser at the proper distancebetween it and the aperture in the side of the illu-minator, being interposed, to modify it. The objectsshould be mounted on dead-black paper and un-covered, and the object-glass accurately adjusted tosuit this condition. The performance of the objec-tives is not at all impaired, but there is a certainamount of flare, due perhaps to superabundance oflight, or reflections, which it would be desirable to get rid of. This, I understand, is also the casewith the similar appliance made by Powell andLealand. These instruments may yet be improvedin this point; but it is probable that, as they are. Fig. 67. Scales of Pieris Brassic® objective, with sameilluminator. made more complex, the price, which is now soreasonable, will be greatly increased. Surely, none can contemplate the minute speci-mens of Divine handiwork, referred to in this paper,without a feeling of awe at the infinite skill of theCreator. The elaborate ornamentation of the scaleson a butterflys wing, which are numbered byhundreds of thousands, and in some even bymillions, on a single insect, cannot be adequatelycopied by the pencil, and we have to be contentwith a general approximation. Compared with the richness of the dress worn by these humble creatures in the scale of life, what are the tawdry gewgaws with which human beings delight to deck themselves? Look at one scale from the Diamond Beetle, and say to what jewel it can be likened; so many colours of brightest hue does it transmit to the eye. S. J. MTntiee. SIMPLE OBJECTS—XL SPH^EKIA HEKBARTJM. AT this season of the year, and for two or threemonths to
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Keywords: ., bookcentury1800, booksubjectnaturalhistory, booksubjectscience
