| Oak, to Dye |
| Oaks, to Raise |
| Oats |
| Qualities of |
| Oatmeal Gruel |
| Odors, Unpleasant, to Remove |
| Oil and Water Colors (see COLORS) |
| Artificial, of Quince |
| Wine |
| Apple |
| Jargonelle Pear |
| Bitter Almonds |
| Geranium |
| Macassar |
| OILS, ESSENTIAL, ETC. |
| Adulterations of |
| Siccitive |
| Furniture, to make |
| Fixed |
| of Sweet Almonds |
| Beech-nut |
| Brick |
| Hazel-nut |
| Mace |
| Olives, Salad, or Sweet |
| Castor |
| to Purify |
| Mixture |
| Croton |
| Rape |
| to Purify |
| Vegetable, to Purify |
| Watchmaker's |
| Coal, to Clarify |
| to Test |
| Drying |
| Pumpkin, to make |
| Animal, and Fat, etc. |
| Hog's Lard |
| to Purify and Bleach |
| Spermaceti, to Refine |
| Trotter, or Neat's-foot |
| Greenland Whale and Seal, to Refine |
|
| Oil, to Extract from Stone or Marble |
| out of Boards |
| Fish, to Purify, and Apply the Refuse to Useful | | Purposes |
| to Prevent becoming Rancid |
| for making Hard Soap, to prepare |
| Ointments |
| Olio Broth, to make |
| Omelette |
| Souffle |
| Onions, to Cultivate |
| Opodeldoc |
| Opium, Poisoning by |
| Optical Glasses, to Polish |
| Oreide, a New Brass |
| Ore, to Assay |
| and Earths containing Gold |
| Ormolu, or Mosaic Gold |
| Orange Cordial, to make |
| Marmalade |
| Flower Water |
| Drops |
| Paste for Hands |
| to Candy |
| Orchards, to Manage |
| Orfila's Hair Dye |
| Osborn's Photographic Process |
| Otto of Roses |
| Oxygen |
| Oxymel of Squills |
| Oysters, to Fry |
| to Choose |
| Corn and |
| Pan |
| Pickle |
| Roast |
| Scollop |
| Spice |
| to Stew |
| and Cockles, Qualities of |
| Ozone, Tests for |
|
