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 lamb and mutton are irradiated at substerilization doses, the meat becomes dehydrated, the fat becomes chalky, and, again, unnatural changes in color occur.

When used appropriately, opioids and similar narcotic analgesics are otherwise safe and effective, however risks such as addiction and the body becoming used to the drug ( tolerance ) can occur.

When subjected to loading, debonding may occur at different locations in the adhesive joint.

When an APAF-1 gene trap is introduced into cells, many morphological changes occur, such as spina bifida, the persistence of interdigital webs, and open brain.

When assured by Mersenne that it was, indeed, the product of the son not the father, Descartes dismissed it with a sniff: " I do not find it strange that he has offered demonstrations about conics more appropriate than those of the ancients ," adding, " but other matters related to this subject can be proposed that would scarcely occur to a sixteen-year-old child.

When barter did in fact occur, it was usually between either complete strangers or would-be enemies.

When context switches occur frequently enough the illusion of parallelism is achieved.

When the process of escape and return reaches an equilibrium, the vapor is said to be " saturated ," and no further change in either vapor pressure and density or liquid temperature will occur.

When the bid matches the offer, a transaction can easily occur ( even instantenously, as in a typical stock market ).

* When certain consonants occur together, special conjunct symbols are used which combine the essential parts of each letter.

When President Aristide returned to Haiti, some improvements did occur in the manufacturing sector.

When making assessments of how often relatively rare events will occur, analyses are made in terms of the return period of such events.

When inspired air contains CO levels as low as 0. 02 %, headache and nausea occur ; if the CO concentration is increased to 0. 1 %, unconsciousness will follow.

# When a given style of production relations no longer supports further progress in the productive forces, either further progress is strangled, or ' revolution ' must occur.

When this approach is used, the hash function must be chosen so that the result has fairly uniform distribution between 0 and n − 1, for any value of n that may occur in the application.

When the Sun is active, strong solar flares can occur that will hit the sunlit side of Earth with hard X-rays.

When either writing through or directly to physical device registers, this may, but not necessarily, cause a real interrupt to occur at the device's central processor unit ( CPU ), if it has one.

When units occur in exponentiation, such as in square and cubic forms, any multiplier prefix is considered part of the unit, and thus included in the exponentiation.

When a hydrated crystal is left in air, dehydration may occur slowly.

When transaction costs are low and parties involved are perfectly informed, a mutually beneficial agreement will occur: whoever values the property the highest will end up with it.

When a fluid is flowing through a closed channel such as a pipe or between two flat plates, either of two types of flow may occur depending on the velocity of the fluid: laminar flow or turbulent flow.

When Luthor admits that he had not only anticipated the attack, but had arranged for it to occur in order to lure Superman out, the Mayor deputizes Superman to arrest Luthor for reckless endangerment.

When a peripheral fiber is severed, the myelin sheath provides a track along which regrowth can occur.

When core convection does not occur, a helium-rich core develops surrounded by an outer layer of hydrogen.

When this did not occur, he soon returned to Rome, discussing a truce with the assassins ' faction.