Show I 1 f from the tha saturday elenina post Chemis chemistry tTy for the young Q if a flat piece of moist leather be put in close contact with a stone or other heavy body and a cord be attached to the centre of the leather tile the stone may be lift lifted ted by I 1 the cord explain this I 1 11 A the air is excluded between the leathor leather and tits the stone consequently a vacuum is for formed and owing to the pressure of tile the atmosphere chichis chis equal to fifteen pounds for every every square inch the leather and stane are 49 so firmly ait attached ached together that the weight of tho the stonia is riot not sufficient to separate them I 1 Q how do flies and other insets insects walk on the hie c ceiling ei lin A this his depends on oil the formation of their feet which act in the manner described respecting the leather and the stone their feet act as suc suckers kors excluding the air between them and the belling or surface with which th they eyare are in contact and the atmospheric pressure pressure keeps the insect inspect from falling failing I 1 I 1 1 Q why do the sails of a wind windmill mill turn round runner I 1 A because the wind blowing against the oblique surface of the saus sails pushes them out of the way WiLy driving them from place to place in in i a restless round f Q why does a piece of bf sugar hold in a spoon I 1 ache at the top or of our tea welt very A because as the tea becomes sw sweetened eeten ed it I 1 descends to the lie bottom bottorof of f the cup by its own I 1 I 1 gravity and fresh por portions timis of unsweetened tea I 1 ace brought constantly into contact with tile th sugar I 1 01 the th lump is oli entirely dissolved I 1 Q why does the lumo lumb of sugar meli mel more quickly when stirred about I 1 2 A because fresh portions of unsaturated tea comes in contact with the lump lamp and soon dissolve disi digi i it i I 1 I 1 I 1 I 1 Q why does water uter freeze more quickly than I 1 milk 1 I 1 I 1 i A because milk contains certain wits insolo in solar tion HOD lit of br which it requires a 9 greater reater degree of eble caldito to congeal it thaia water water freel freezes zes at 32 dog 1 but salt and water will I 1 not knot freeze unless the sinks below 17 7 dog deg 1 I 1 Q when the plants plante called trefoil dandelion pi pimpernel pim pernal etc fold up then leaves rain is is always lose close at hand canil explain thiel t I 1 A 1st ast the cloudy weather ea their diminishes the light of the sun and without the stimulus of sun liggit these flowers never open their lemes and 2nd the of the damp fair dreir juto iota the air vessels afi these delicate plants I 1 jamses them bliem to expand in consequence of bt which the loaf leaflets lets contrast and dose all these thesa at buu set dilso 1 I 1 qt i i why the air which passes passe over water so ao eab I 1 ad passes W wes hindt land A doos not cod cobl down at son sax seto fast as land landd bes sand th tha ariett contact with it remains warmer V 1 41 af I 1 1 I va Q 6 Why p dars dois ilot not wa ter cool down so 1 fast as s giuld 7 J YA JA b because because tile the surface of water 1 is per magally and a as s fast fasl as 15 one sp surface I 1 is s r made de ler is is p cited and 0 jand nd T tup A water rz er is made cold boldt I 1 it s anks O id a 4 farmei warmer port ious ef cf waterY vater rise ise to occupy its I 1 gap e therefore theredo e before ae Q of water is jadeed Jad A 0 led the whole volume must be chiado cold aich ilch is not the cise case with laud laid I 1 I 1 I 1 |