When rebuilt in the 1830s, the Cumberland Road became the first road in the U. S. to use the new macadam road surfacing.

When surfacing to breathe, a sea turtle can quickly refill its lungs with a single explosive exhalation and rapid inhalation.

When surfacing the grey saddle shows up over the black back, behind the dorsal fin.

When leaving the nest to feed, she slips quietly into the water and submerges, not surfacing until she is well away from it.

When submarines of the U. S. Navy made expeditions to the North Pole in the 1950s and 60s, there was a significant concern about surfacing through the thick pack ice of the Arctic Ocean.

When infants with undiagnosed upper cervical spinal cord injury are continually placed on their stomachs for sleep, they are forced to turn their heads to the side to breathe.

When other competitors questioned the moustache and the potential increased drag, he claimed that it helped create a pocket of air to breathe.

When divers breathe helium-based gas mixes such as trimix, they often avoid inflating their suits with the helium-based gas due to its high thermal conductivity.

When coming to the surface to breathe, adults tend to show only the top of their head, whereas calves will throw their entire head out of the water.

When they swim slowly, they expose only a small area of the head and back when they surface to breathe.

When the diver starts to breathe in, the inhalation lowers the pressure inside the chamber, which moves the diaphragm inwards operating a system of levers.

When the water begins to freeze, alligators stick their snouts though the surface which allows them to breathe above the ice.

When human telepath Lyta Alexander journeyed to Vorlon space to contact them, she was physiologically altered to breathe the atmosphere and serve as attache for the Vorlon embassy.

When they claim that there is nothing else to be done, Knowles reminds them that if they were able to change the methane to oxygen to allow him to breathe without spacesuit, surely they could change the planet into a living world again.

When they hatch, the young resemble tadpoles, with external gills, and only later develop lungs and begin to breathe air.

Taglines included, " It's a matter of life and breath ," " When you can't breathe, nothing else matters " and currently, " Fighting for Air "

When Beowulf wounds the dragon a second time, striking so hard his sword shatters, Wiglaf strikes at the open wound with his own sword, tearing at the dragon's throat so it can no longer breathe fire.

Other glees like " When winds breathe soft ", " Thy voice, O Harmony ", and " Would you know my Celia's charms " became even better known.

When they resurface they realize to their astonishment that they are unable to breathe without using their oxygen tanks.

When Billy arrives, he deems it necessary to cut a hole in the horse's windpipe so he can breathe.

When Marsh called to his aide and the pair rode off down the River Road where the gentians burned blue, Juanita was shaken and trying not to cry.

When carried, the Ark was always wrapped in a veil, in skins and a blue cloth, and was carefully concealed, even from the eyes of the priests who carried it.

When the burner is regulated to produce a hot, blue flame it can be nearly invisible against some backgrounds.

Writing in 2010 Neil Finn said, " When we lost Paul it was like someone pulled the rug out from underneath everything, a terrible jolt out of the dark blue.

When the Dallas Cowboys franchise debuted in 1960, the team's uniform included a white helmet adorned with a simple blue star and a blue-white-blue stripe down the center crown.

When present together in solid solution, energy is transferred from the higher-energy tungsten to the lower-energy molybdenum, such that fairly low levels of molybdenum are sufficient to cause a yellow emission for scheelite, instead of blue.

When hemoglobin combines with CO, it forms a very bright red compound called carboxyhemoglobin, which may cause the skin of CO poisoning victims to appear pink in death, instead of white or blue.

There he repeated in a different form all that he had already said, for all the world as if he had a gramophone fixed in his brain ... When I took leave, he subjected me to an interminable handshake, meanwhile fixing his cold blue eyes on mine, and repeating almost word for word what he said to me on arrival ... I felt I should never be able to establish any human contact with this man " In early June 1940, when Mussolini informed Hitler that he at long last would enter the war on 10 June 1940, Hitler was most dismissive, in private calling Mussolini a cowardly opportunist who broke the terms of the Pact of Steel in September 1939 when the going looked rough, and was only entering the war in June 1940 after it was clear that France was beaten and it appeared that Britain would soon make peace.

When ordered by temperature and when duplicate classes were removed, the spectral types of stars followed, in order of decreasing temperature with colors ranging from blue to red, the sequence O, B, A, F, G, K and M. ( A popular mnemonic for memorizing this sequence of stellar classes is " Oh Be A Fine Girl / Guy, Kiss Me ".

When viewed from " Viewpoint A ", the object appears to be in front of the blue square.

When the exact chromaticities of the red, green, and blue primaries are defined, the color model then becomes an absolute color space, such as sRGB or Adobe RGB ; see RGB color spaces for more details.

When burned, sulfur melts to a blood-red liquid and emits a blue flame that is best observed in the dark.

When the Seahawks debuted in, the team's logo was a stylized royal blue and forest green hawk's head based on Northwestern tribal art.

When Sophie, Countess of Wessex was granted arms, the sinister supporter assigned was a blue wyvern, described by the College of Arms as " an heraldic beast which has long been associated with Wessex ".

When red is mixed with blue it moves away from man to become purple, which is a cool red.

When using a blue screen, different weather maps are added on the parts of the image where the color is blue.

" When the traveller Charles Fellows saw the tombs in 1840 he found them still colorfully painted red, yellow and blue.

" When people who speak such languages are shown a green chip, some identify it using their word for blue, others identify it using their word for yellow.

Recordings of works by Richard Leveridge include the songs " Black and gloomy as the grave ", " When daisies pied and violets blue ", and " The Roast Beef of Old England ".

When the die floats to the top and one of its faces is pressed against the window, the raised letters displace the blue liquid to reveal the message as white letters on a blue background.

When I met you, you were not so much as a fifth-rate journalist, and now you can write quite good prose with no more than my blue pencil through two out of every three adjectives, and five out of every six commas.

When orcs were present, it glowed blue, as it did when the Fellowship encountered orcs in the mines of Moria.