A. As the _tops of high mountains_ are generally _above the clouds_; therefore, travellers (who climb the mountains) may _pass quite through the clouds_, into a clear blue firmament, when they may see the clouds _beneath their feet_. Q. _Why are the CLOUDS so VARIABLE in SHAPE?_ A. The _shape_ of clouds depends upon two things:--Their state of _electricity_, and _the wind_. Q. _How can ELECTRICITY affect the SHAPE of CLOUDS?_ A. If one cloud be _full of electricity_, and another _not_, they will be _attracted to each other_, and either coalesce,--diminish in size,--or vanish altogether. Q. _Which clouds assume the most FANTASTIC shapes?_ A. Those that are the most _highly electrified_. Q. _What effect have WINDS on the SHAPE of CLOUDS?_ A. They sometimes _absorb them entirely_: sometimes _increase their volume and density_; and sometimes _change the position of their parts_. Q. _How can WINDS ABSORB CLOUDS altogether?_ A. _A warm dry wind_ will convert the substance of the clouds into _invisible vapour_, and carry it in its own current. Q. _How can WINDS INCREASE the bulk and density of CLOUDS?_ A. A _cold_ current of wind will _condense the invisible vapour of the air_, and _add it to the clouds_ as it passes by. Q. _How can WINDS CHANGE the SHAPE of CLOUDS by altering the position of their parts?_ A. Because clouds are so voluble and light, that every breath of wind changes the position of those ves'cicles or bubbles. Q. _What are the general COLOURS of the CLOUDS?_ A. White and grey, _when the sun is above the horizon_: but red, orange, and yellow, _at sun-rise and sun-set_. The _blue sky_ cannot be considered as _clouds_ at all. Q. _Why are the LAST CLOUDS of EVENING generally of a RED tinge?_ A. Because _red_ rays are the _least refrangible of all_; and, therefore, _are the last to disappear_. Q. _What is meant by being "LESS REFRANGIBLE"?_ A. Being _less able to be bent_. Blue and green rays being very easily bent (_by the resistance of the air_) are thrown _off from the horizon_; but red rays not being _bent back_ in the same way, give a tinge to the evening clouds. Q. _Why are MORNING CLOUDS generally of a RED tinge?_ A. Because red rays are the _least refrangible of all_, and not being _bent back by the air_ (like blue and green), _strike upon the horizon_, and give a tinge to the morning clouds. Q. _Why is not the reflection of clouds always ALIKE?_ A. Because their _size, density, and situation in regard to the sun_, vary perpetually; so that sometimes _one_ colour is reflected, and sometimes _another_. Q. _What regulates the MOTION of the CLOUDS?_ A. The _motion of the clouds_ is generally directed by the _winds_; but sometimes _electricity_ will influence their motion also. Q. _How do you know that CLOUDS move by OTHER influences besides WIND?_ A. Because we often see in calm weather _small clouds meeting each other_ from opposite directions.