A Short History of ScienceMacmillan, 1917 - 474 sider |
Fra bogen
Resultater 1-5 af 59
Side 27
... equal weights of water corresponded equal intervals of time . Starting the flow at the moment the upper edge of the sun first appeared in the east and stopping as soon as the whole sun was visible , the amount of water collected was ...
... equal weights of water corresponded equal intervals of time . Starting the flow at the moment the upper edge of the sun first appeared in the east and stopping as soon as the whole sun was visible , the amount of water collected was ...
Side 28
... equal to the radius subtends one - sixth of the four right angles at the centre , and is thus one side of a regular inscribed hexagon , a figure found on Babylonian monuments . A failure to distinguish between the length of the arc and ...
... equal to the radius subtends one - sixth of the four right angles at the centre , and is thus one side of a regular inscribed hexagon , a figure found on Babylonian monuments . A failure to distinguish between the length of the arc and ...
Side 40
... equal parts , the rate of flow in the clepsydra required continual adjustment . Ingenious improvements were made in the mechanism in course of time , but in considering the work of the Greek astronomers , the impossibility of what we ...
... equal parts , the rate of flow in the clepsydra required continual adjustment . Ingenious improvements were made in the mechanism in course of time , but in considering the work of the Greek astronomers , the impossibility of what we ...
Side 44
... equal ; when two straight lines cut each other the opposite angles are equal ; the first proof that the circle is bisected by its diameter ; the in- scription of the right triangle in the semicircle ; the measurement of height by shadow ...
... equal ; when two straight lines cut each other the opposite angles are equal ; the first proof that the circle is bisected by its diameter ; the in- scription of the right triangle in the semicircle ; the measurement of height by shadow ...
Side 51
... equal equilateral triangles have a common vertex they will when cut or folded so that their edges are brought together , form a solid angle , and a fourth equal triangle will complete a regular tet- rahedron . Similarly , if we start ...
... equal equilateral triangles have a common vertex they will when cut or folded so that their edges are brought together , form a solid angle , and a fourth equal triangle will complete a regular tet- rahedron . Similarly , if we start ...
Andre udgaver - Se alle
Almindelige termer og sætninger
Alexandria algebra Almagest analytic geometry ancient angle animals appear Arabic Archimedes Aristotle arithmetic astronomy Babylonia calculus centre Century B.C. CHAPTER chemical chemistry circle conic sections Copernicus cosmogony curve Democritus Descartes Diophantus discovered discovery distance earth Egyptian eighteenth century electricity elements engineer equal equations Euclid Euclid's Elements Europe evolution experiment force Galileo Galileo Galilei genius geology geometry Greece Greek Greek mathematics heat heavenly bodies heavens Hipparchus history of science Holy Huygens hypothesis ideas important invention Jupiter Kepler knowledge known later laws learning mathe mathematical science mathematicians matical measure mechanics method modern moon motion natural Newton nineteenth century observed orbits origin period phenomena philosophy Phoenicians physical planets Plato principle problem progress Ptolemy Pythagoras Pythagorean Roman says scientific solution sphere spherical square stars telescope Thales theorems theory things tion treatise triangle Tycho Tycho Brahe universe velocity
Populære passager
Side 341 - I often say that when you can measure what you are speaking about and express it in numbers you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind...
Side 400 - Whatever, in connection with my professional practice or not in connection with it, I see or hear in the life of men, which ought not to be spoken of abroad, I will not divulge as reckoning that all such should be kept secret.
Side 199 - Rather admire; or if they list to try Conjecture, he his fabric of the Heavens Hath left to their disputes, perhaps to move His laughter at their quaint opinions wide Hereafter, when they come to model Heaven And calculate the stars, how they will wield The mighty frame; how build, unbuild, contrive To save appearances; how gird the sphere With centric and eccentric scribbled o'er, Cycle and epicycle, orb in orb...
Side 399 - I will keep this oath and this stipulation— to reckon him who taught me this art equally dear to me as my parents, to share my substance with him and relieve his necessities if required, to look upon his offspring in the same footing as my own brothers and to teach them this art if they shall wish to learn it without fee or stipulation...
Side 351 - It is hardly necessary to add that anything which any insulated body, or system of bodies, can continue to furnish without limitation, cannot possibly be a material substance; and it appears to me to be extremely difficult, if not quite impossible, to form any distinct idea of anything capable of being excited and communicated in the manner the Heat was excited and communicated in these experiments, except it be MOTION.
Side 300 - I do not know what I may appear to the world, but to myself I seem to have been only like a boy playing on the sea-shore, and diverting myself in now and then finding a smoother pebble or a prettier shell than ordinary, whilst the great ocean of truth lay all undiscovered before me.
Side 331 - Given for one instant an intelligence which could comprehend all the forces by which nature is animated and the respective situation of the beings who compose it an intelligence sufficiently vast to submit these data to analysis it would embrace in the same formula the movements of the greatest bodies of the universe and those of the lightest atom...
Side 269 - Our business was (precluding matters of Theology and state affairs) to discourse and consider of Philosophical Enquiries, and such as related thereunto : as physick, anatomy, geometry, astronomy, navigation, staticks, magneticks, chymicks, mechanicks, and natural experiments ; with the state of these studies, as then cultivated at home and abroad.
Side 399 - I swear by Apollo the physician and Aesculapius and health and all-heal and all the gods and goddesses that according to my ability and judgment I will keep this oath and this stipulation— to reckon him who taught me this art equally dear to me as my parents...
Side 39 - Go, and say to Hezekiah, Thus saith the Lord, the God of David thy father : I have heard thy prayer, I have seen thy tears ; behold, I will add unto thy days fifteen years.