When they reached their neighbor's house, Pamela said a few polite words to Grace and kissed Melissa lightly on the forehead, the impulse prompted by a stray thought -- of the type to which she was frequently subject these days -- that they might never see one another again.

When she would do these things, he would turn blind for an instant and become sick at his stomach.

When these had been pocketed, we could still spend a morning cracking open other pebbles for our delight in seeing how much prettier they were inside than their dull exteriors indicated.

When these fields are surveyed together, important patterns of relationship emerge indicating a vast community of reciprocal influence, a continuity of thought and expression including many traditions, primarily literary, religious, and philosophical, but frequently including contact with the fine arts and even, to some extent, with science.

When these chores were finished, only then, was she allowed whatever freedom she could find.

When the recent Katangan outbreaks imperiled these solutions Mr. Hammarskjold, despite the danger, flew to exert a calming influence.

When they got home Harold was grateful for the stillness in the apartment, and thought how, under different circumstances, they might have stayed on here, in these old-fashioned, high-ceilinged rooms that reminded him of the Irelands' apartment in the East Eighties.

When these groups were first formed many prominent and accomplished decorators could not have had the advantage of school training since interior design courses were rare and undeveloped during their youth.

When now we count the frequency of the 71 items in the two language families appearing in the same column or grade, or one column or grade apart, or two or three or four, we find these differences: Af

When Mayor Dever heard of the banquet he summoned Hughes for an explanation of why he had been dishonouring the police department by consorting with these felons and fixers.

When Felix first opened the door on it, all these shades were tightly drawn and the whole studio was as dark as night.

When, therefore, it turned its attention to the concrete entities with which popular imagination had peopled the world of spirit, these entities soon lost whatever status they had enjoyed as actual elements of external reality.

When dam construction began in 1933, fewer than 600 boats used these waters ; ;

When these do not work, he tries to avoid responsibility, saying he will ask the government for orders.

When heated to form a solution and then cooled quickly, these alloys become much softer than normal, during the diffusionless transformation, and then harden as they age.

When Ewen rejected these attempts, Alexander sailed forth to compel him, but on the way he suffered a fever at the Isle of Kerrera in the Inner Hebrides.

" When we run over libraries, persuaded of these principles, what havoc must we make?

When blacks began singing adapted versions of these hymns, they were called Negro spirituals.

When James Bradley and Samuel Molyneux entered this sphere of astronomical research in 1725, there consequently prevailed much uncertainty whether stellar parallaxes had been observed or not ; and it was with the intention of definitely answering this question that these astronomers erected a large telescope at the house of the latter at Kew.

When calcium is leached from the needles of red spruce, these trees become less cold tolerant and exhibit winter injury and even death.

When the end came, these troops simply shifted their allegiances to the new barbarian rulers.

When these cells become entrapped from osteoblasts they become osteocytes.

When the pH of this solution rises, as a result of dilution by fresh water, these ions precipitate, forming " Yellow Boy " pollution.

When the United States renounced its offensive biological warfare program in 1969 and 1970, the vast majority of its biological arsenal was composed of these plant diseases.

When bacterial populations have these resistant subgroups, treatment with β-lactam can result in the resistant strain becoming more prevalent and so more virulent.

When the particles are in great motion, they produce a Doppler shift for measuring wind speed in the laser light, which is used to calculate the speed of the particles, and therefore the air around the anemometer.

When light is sent through the sample, it is backscattered by the particles / droplets.

When particles in a beam are thrown against a foil made of a certain substance, the cross section is a hypothetical area measure around the target particles of the substance ( usually its atoms ) that represents a surface.

When considered as particles, they are known as photons, and each has an energy related to the frequency of the wave given by Planck's relation E

When electromagnetic radiation is incident on matter, it causes the charged particles to oscillate and gain energy.

When matter ( ordinary material particles ) is changed into energy ( such as energy of motion, or into radiation ), the mass of the system does not change through the transformation process.

When energy is in a form other than thermal energy, it may be transformed with good or even perfect efficiency, to any other type of energy, including electricity or production of new particles of matter.

When calculating scattering cross sections in particle physics, the interaction between particles can be described by starting from a free field which describes the incoming and outgoing particles, and including an interaction Hamiltonian to describe how the particles deflect one another.

When the intermediate states at intermediate times are energy eigenstates ( collections of particles with a definite momentum ) the series is called old-fashioned perturbation theory.

When a group of incoming particles are to scatter off each other, the process can be thought of as one where the particles travel over all possible paths, including paths that go backward in time.

When we perform the experiment, the probability of obtaining two particles in the state is now 0. 33 ; the probability of obtaining two particles in the state is 0. 33 ; and the probability of obtaining one particle in the state and the other in the state is 0. 33.

When the number of particles in one excited state exceeds the number of particles in some lower-energy state, population inversion is achieved and the amount of stimulated emission due to light that passes through is larger than the amount of absorption.

When they encounter an infection site the particles gain a positive charge provoked by the slightly acidic environment at the infection sites, allowing them to bind to the negatively charged bacterial cell walls and release antibiotics at locally high concentration.

When considering light's particle-like properties, the light is modelled as a collection of particles called " photons ".

When subjected to an electromagnetic field the paramagnetic particles change spacing, modifying their color and reflective properties.

When these viral episomes initiate lytic replication to generate multiple virus particles, they in general activate cellular innate immunity defense mechanisms that kill the host cell.