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use "instructive" in a sentence


A good biography is interesting and instructive.

John Dewey once observed that failure is instructive.

The person who really thinks learns quite as much from his failures as from his successes.

Ralph Waldo Emerson once observed that criticism should be guiding, instructive and inspiring.

His lecture was very instructive as usual.

A very striking proof of this statement may be obtained by the following simple and instructive experiment.

It now holds a very high rank among philosophical implements, while the transcendant beauties of form, color and organization, which it reveals to us in the minute works of nature, render it subservient to the most delightful and instructive pursuits.

We must not therefore esteem the riches of our Philosophical treasure by the number only, but chiefly by the weight; the most vulgar Instances are not to be neglected, but above all, the most instructive are to be entertain'd; the footsteps of Nature are to be trac'd, not only in her ordinary course, but when she seems to be put to her shifts, to make many doublings and turnings, and to use some kind of art in indeavouring to avoid our discovery.

Illuminated A in Ass in Geometry, the most natural way of beginning is from a Mathematical point; so is the same method in Observations and Natural history the most genuine, simple, and instructive.

There is one Phænomenon more, which may, if care be used, exhibit to the beholder, as it has divers times to me, an exceeding pleasant, and not less instructive Spectacle; And that is, if curiosity and diligence be used, you may so split this admirable Substance, that you may have pretty large Plates (in companion of those smaller ones which you may observe in the Rings) that are perhaps an 1/8 or a 1/6 part of an inch over, each of them appearing through the Microscope most curiously, intirely, and uniformly adorned with some one vivid colour: this, if examined with the Microscope, may be plainly perceived to be in all parts of it equally thick.

Some Observations of each of which I shall hereunto annex, because if well consider'd and examin'd, they may, perhaps, prove very instructive for the finding out of what I have endeavoured in the preceding Observation to shew, to be (next the Globular Figure which is caus'd by congruity, as I hope I have made probable in the sixth Observation) the most simple and plain operation of Nature, of which, notwithstanding we are yet ignorant.

And to confirm this Conjecture, yet further, I shall here insert an excellent account, given into the Royal Society by that Eminently Learned Physician, Doctor Goddard, of an Experiment, not less instructive then curious and accurate, made by himself on a very hard and seemingly close stone call'd Oculus Mundi, as I find it preserv'd in the Records of that Honourable Society.

Charcoal, or a Vegetable burnt black, affords an object no less pleasant than instructive, for if you take a small round Charcoal, and break it short with your fingers, you may perceive it to break with a very smooth and sleek surface, almost like the surface of black sealing Wax; this surface, if it be look'd on with an ordinary Microscope, does manifest abundance of those pores which are also visible to the eye in many kinds of Wood, rang'd round the pith, both a in kind of circular order, and a radiant one.

And that this may be so, seems with great probability to be argued from the strange Phænomena of sensitive Plants, wherein Nature seems to perform several Animal actions with the same Schematism or Orginization that is common to all Vegetables, as may appear by some no less instructive then curious Observations that were made by divers Eminent Members of the Royal Society on some of these kind of Plants, whereof an account was delivered in to them by the most Ingenious and Excellent Physician, Doctor Clark, which, having that liberty granted me by that most Illustrious Society, I have hereunto adjoyn'd.

But indeed, in this description, the Excellent Piso has not been sufficiently particular in the setting down the whole process, as it were to be wish'd: There are indeed very odd progresses in the production of several kinds of Insects, which are not less instructive then pleasant, several of which, the diligent Goedartius has carefully observ'd and recorded, but among all his Observations, he has none like this, though that of the Hemerobius be somewhat of this kind, which is added as an Appendix by Johannes Mey.

Another way, not less instructive and pleasant, is a way which I have several times done, which is by working and tossing, as 'twere, a parcel of pure crystalline glass whilst it is kept glowing hot in the blown flame of a Lamp, for, by that means, that purely transparent body will be so divided into an infinite number of plates, or small strings, with interpos'd aerial plates and fibres, that from the multiplicity of the reflections from each of those internal surfaces, it may be drawn out into curious Pearl-like or Silver wire, which though small, will yet be opacous; the same thing I have done with a composition of red Colophon and Turpentine, and a little Bee's Wax, and may be done likewise with Birdlime, and such like glutinous and transparent bodies: But to return to our description.

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