In any attempts to gain an insight into the relations between the physical properties and chemical composition of substances, the fact must never be ignored that a comparison can only be made when the particular property under consideration is determined under strictly comparable conditions, in other words, when the molecular states of the substances experimented upon are identical.
No other substance, at least, with which he experimented had a like effect, and it is possible that in the archegonium which contains the ovum malic acid is present.
Many patents have been taken out in this direction, one of the best known being that of Groth, experimented upon by S.
Apart from his idylls and his elegies, Chenier also experimented from early youth in didactic and philosophic verse, and when he commenced his Hermes in 1783 his ambition was to condense the Encyclopedia of Diderot into a poem somewhat after the manner of Lucretius.
The alloy used is composed of 15 parts of bismuth, 8 of lead, 4 of tin and 3 of cadmium; it melts at 70°, and can be experimented with as readily as mercury.
To support the tube containing the substance to be experimented upon, and so avoids the objection to the practice of withdrawing the stopper of the tube, dropping the substance in, and reinserting the stopper.
To complete the apparatus there is a glass jar which serves to hold the liquid experimented with.
54) also measured the refractive indices of various gases, using a prism containing the gas to be experimented on, and he found that the deviation by the prism agreed very closely with the theoretical values of sound in the gas and in air.
About 1852 he purchased a farm at Chappaqua, New York, where he afterwards habitually spent his Saturdays, and experimented in agriculture.
During the voyage he experimented upon the determination of longitude by lunar distances, and ultimately effected the introduction of the method into navigation (q.v.).
Also experimented on the pressure of powder and the velocity of the bullet in a musket barrel; this he accomplished by shortening the barrel successively, and measuring the velocity obtained by the ballistic pendulum; thus reversing Noble's procedure of gradually lengthening the gun.
He experimented with an air-thermometer, in which the temperature was defined by measurement of the length of a column of mercury; and he pointed out that the extreme cold of such a thermometer would be that which reduced the "spring" of the air to nothing, thus being the first to recognize that the use of air as a thermometric substance led to the inference of the existence of a zero of temperature.
The experiment proves only the transparency of the gases experimented upon, and this is confirmed by the fact that bodies like bromine and iodine give on heating an emission spectrum corresponding to the absorption spectrum seen at ordinary temperatures.
The spectra experimented on by Paschen were band spectra, but as these split up into fine lines the possibility of homogeneous radiation in pure thermal oscillation may be considered as established.
Cotton and silk culture have been experimented with on the islands; and the work of the Hawaiian Agricultural Experiment Station is of great value, in introducing new crops, in improving old, in studying soils and fertilizers and in entomological research.
He next experimented with a highpressure hydrogen jet by which low temperatures were realized through the Thomson-Joule effect, and the successful results thus obtained led him to build at the Royal Institution the large refrigerating machine by which in 1898 hydrogen was for the first time collected in the liquid state, its solidification following in 1899.
"Heavy glass was experimented with.
Among those who experimented in this direction was Joseph Aspdin, of Leeds, who added clay to finely ground limestone, calcined the mixture, and ground the product, which he called Portland cement.
With Die Braut von Messina (1803) he experimented with a tragedy on purely Greek lines, this drama being as close an approximation to ancient tragedy as its medieval and Christian milieu permitted of.
More than 300 trees were cut down and experimented with, the species under test embracing ten different kinds of pine and five different varieties of hard-wood trees.
He loved gardening, experimented enthusiastically in varieties and rotations of crops and kept meteorological tables with diligence.
They also prove that, whilst Metius was in possession of a telescope, with which he may have experimented, about the time when Lippershey presented his application for patent rights, yet.
Attempts to naturalize that well-known Australian grass-parrakeet the budgerigar (Melopsittacus undulatus) in England have so far proved abortive, and none of the species experimented with in Norfolk and Bedfordshire effected a settlement.
P. 620) experimented on liquid films, and showed how a film of a liquid of high surfacetension is replaced by a film of lower surface-tension.
He also experimented on the effects of the thickness of the film, and came to the conclusion that the thinner a film is, the greater is its tension.
Various remedies for the opium habit have been experimented with in China, but with doubtful success.
And this I have experimented in a dark Room by illuminating those bodies with uncompounded light of divers colours.
He experimented successfully with the electrical apparatus presented to Yale by Benjamin Franklin, whose intimate friend he became.
The vertical retort was one of the first forms experimented with by Murdoch, but owing to the difficulty of withdrawing the coke, the low illuminating power of the gas made in it, and the damage to the retort itself, due to the swelling of the charge during distillation, it was quickly abandoned.
This process, although strongly advocated by the gas engineer who experimented with it, was never a commercial success.
Foremost among the able men who experimented in this latter direction was Mr F.
He experimented in an attempt to improve on the sessions but to no avail.
The connection she'd experimented with when he slept grew intimate when he was awake.
We experimented on Dusty.
I volunteered to help you catch a vamp, not become the vamp you experimented on!
Not satisfied with seed-sown grass or meadow turf, they experimented with seaside turf and found it answer admirably.
Considerable interest attaches to the " Caravonica " cotton raised in South Australia, which has been experimented with in Australia, Ceylon and elsewhere.
We know the amount present in the precipitate, and since the same amount is present in the quantity of substance experimented with, we have only to work out a sum in proportion.
This tube was placed in an outer tube containing the liquid to be experimented with; the liquid is raised to its boiling-point, and then hermetically sealed.
Mag., 1886, 22, 535) experimented on the relation of tractive force to magnetic induction.
] Joule and others experimented with hardened steel, but failed to find a key to the results they obtained, which are rather complex, and have been thought to be inconsistent.
Shimizu,' who experimented at temperatures ranging from - 186° to 1200°.
They also experimented with constant temperatures of -79°, -185° and -203', and found that at these low temperatures the effect of magnetization was enormously increased.
He also experimented with nickel and again found a resemblance to the strain curve.
Leber experimented with several chemical compounds to find what reaction they had on these cells; by using fine glass tubes sealed at the outer end and containing a chemical substance, and by introducing the open end into the blood vessels he found that the leucocytes were attracted - positive chemiotaxis - by the various compounds of mercury, copper, turpentin, and other substances.
He experimented in the outlying provinces of his empire; and the Russians noted with open murmurs that, not content with governing through foreign instruments, he was conferring on Poland, Finland and the Baltic provinces benefits denied to themselves.