CONTENTS. 



Hydrometer and areometer 

 Hydro-oxides - 

 Hydrostatics 

 Hydrosulphurets 

 Hygrometer 

 Hyperbola 



Hyperbolic cylindroid 

 Hyperbolic line 

 Hypothenuse - 



Ice, at door steps, hints respecting 



Impetigo, burdock in - 



Impetus ...... 



Incline plane - - . . . 

 Incurvation . . . . . 



Indigo 125, 



Induction ---.-. 

 Inertia, of matter - . _ . 



Inflection - 



Infusion, .--.-. 

 Ink, Indian, manner of making - 

 Ink, lithographic, .... 

 Ink, indelible, for quill or rhetallic pens 



Inks, described - - . . 164, 

 Ink stains, how to remove - 



Inolithus 



Inscribe --..-. 

 Insolation ------ 



Instruments, mathematical - - - 

 Insurance ------ 



Integer --.-_- 

 Internal --.--. 

 Intersection - - - ■ - 

 Invention ------ 



Involution - - . . _ 



Iodine, in mineral waters - - . 

 Iodine, medical properties of - - 

 Iodine, described - . . . 

 Ipecacuanha, process to make sirup of 

 Iridium, described - - - - 



Iron, to prevent, from rusting 



Iron, medical properties of - 



Iron, action of sulphur on - 



Iron, soft, that will cut hardened steel - 



Iron bars, phenomena observed in proving 



Iron improved by manganese 



Iron, properties of - - . 77, 



Irritability - - - . . 



Irritation, counter - - _ - 



Ivory, hints on whitening - . - 



Ivory, process to whiten 



Ivory, described - - - - 



Ivory black 



Japanning, process of - - - 



Jatropha, the cassada plant 



Jelly, in chemistry - - - _ 



Joint-tenants, (in law) - - . 



Jointure, (in law) - - - - 



156 

 156 

 156 

 157 

 157 

 158 

 158 

 158 

 158 



85 

 89 

 164 

 164 

 164 

 153 

 164 

 164 

 164 

 164 

 6 

 15 

 56 

 165 

 166 

 166 

 166 

 166 

 166 

 166 

 166 

 166 

 167 

 167 

 167 

 3 

 130 

 167 

 169 

 169 

 102 

 130 

 131 

 131 

 131 

 135 

 170 

 174 

 174 

 85 

 131 

 174 

 175 



182 

 184 

 184 

 185 

 185 



Judgments, (in law) - - - . 185 



Jiiglans, (in botany) - - - . 186 



Jiiniperus, (in botany) - _ . 186 



Justification, (in law) ... 186 



Lamp, Gurney's oxy-oil - - - 113 



Lead, -...-. 77 



Leather, patent substitute for - - 3 



Light 48 



Light and heat, efi'ects of, on vegetation 106 



Machinery, increase of velocity in - 10 

 Machine, for boot and shoe makers - 28 

 Machine, thrashing, Lee's described - 67 

 Machinery for moving goods - - 148 

 Manuscripts, manner to take impres- 

 sions from - . - - - 

 Manganesum - - - - - 



Manna --.... 



Mathematical instruments, improve- 

 ments in - . - . . 

 Matter which influence vegetation, 48 

 to 95, in article Agricultural Che- 

 mistry .... - 48, &c. 



Meat, fresh, how to preserve in winter 84 

 Mechanical agents, new suggested - 176 

 Mercury .---.. 77 

 Meteorology and vegetation, connection 



between - ... - 4 



Mill, wind, in mechanics, - - 15, 154 

 Mill, new kind of rubbers suggested - 160 

 Monocotyledonous . - - - 

 Morus multicaulis, how to preserve in 

 winter ------ 



Morus multicaulis, white mulberry, silk 

 and silk worms - - . - 

 Morus multicaulis and silk culture 

 Mucilage --.--. 

 Mulberry tree and silk worm 



12 



77 

 111 



53 



108 



35 



64 



81 



109 



118 



Narcotic principle - - - . 125 



Needle, injury from the puncture of a - 128 

 Neuralgia, white hellibore (Veralrtim 



album) in . . . . - 88 



Nickel 77 



Nitrogen, proportion in different varie- 

 ties of wheat . - - - - 5 

 Notice to subscribers - - . - 192 



Oats, Hints on feeding animals with - 84 



Oil, fixed 133 



Oil, Volatile - - - ' - - 133 

 Oranges and Lemons raised from cut- 

 tings ------ 34 



Oxides, Metallic - - - -151 



Oxide in plants - - - - - 152 



Oxygen ------ 76 



Parenchima - - - - - 96 



