Wrinkles in Electric Lighting Part 2

A dynamo is not a _battery_ as some people call it, and there is no need for multiplying names.

A pocket speed-indicator should be supplied for testing the speed of the dynamo, to see that it is kept up to proper speed, and that the belt (if used) does not slip to an unreasonable extent.

I think I have now said enough to redeem my introductory promise, and if I have, so to speak, let more electric light on to a subject previously dark to a good many people, I shall be well satisfied with my labour, and I hope that those who peruse this book will be induced to go more deeply into the subject by means of the many good books which have been written by cleverer men than I, and which enter more thoroughly into all its details.

[Ill.u.s.tration]

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BOOKS RELATING TO APPLIED SCIENCE, PUBLISHED BY E. & F. N. SPON, LONDON: 125, STRAND.

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_A Pocket-Book for Chemists, Chemical Manufacturers, Metallurgists, Dyers, Distillers, Brewers, Sugar Refiners, Photographers, Students, etc., etc._ By THOMAS BAYLEY, a.s.soc. R.C. Sc. Ireland, a.n.a.lytical and Consulting Chemist and a.s.sayer. Fourth edition, with additions, 437 pp., royal 32mo, roan, gilt edges, 5_s._

SYNOPSIS OF CONTENTS:

Atomic Weights and Factors--Useful Data--Chemical Calculations-- Rules for Indirect a.n.a.lysis--Weights and Measures--Thermometers and Barometers--Chemical Physics--Boiling Points, etc.--Solubility of Substances--Methods of Obtaining Specific Gravity--Conversion of Hydrometers--Strength of Solutions by Specific Gravity--a.n.a.lysis-- Gas a.n.a.lysis--Water a.n.a.lysis--Qualitative a.n.a.lysis and Reactions-- Volumetric a.n.a.lysis--Manipulation--Mineralogy--a.s.saying--Alcohol-- Beer--Sugar--Miscellaneous Technological matter relating to Potash, Soda, Sulphuric Acid, Chlorine, Tar Products, Petroleum, Milk, Tallow, Photography, Prices, Wages, Appendix, etc., etc.

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_Just Published, in Demy 8vo, cloth, containing 975 pages and 250 Ill.u.s.trations, price 7s. 6d._

SPONS' HOUSEHOLD MANUAL:

A Treasury of Domestic Receipts and Guide for Home Management.

PRINc.i.p.aL CONTENTS.

=Hints for selecting a good House=, pointing out the essential requirements for a good house as to the Site, Soil, Trees, Aspect, Construction, and General Arrangement; with instructions for Reducing Echoes, Waterproofing Damp Walls, Curing Damp Cellars.

=Sanitation.=--What should const.i.tute a good Sanitary Arrangement; Examples (with ill.u.s.trations) of Well--and Ill-drained Houses; How to Test Drains; Ventilating Pipes, etc.

=Water Supply.=--Care of Cisterns; Sources of Supply; Pipes; Pumps; Purification and Filtration of Water.

=Ventilation and Warming.=--Methods of Ventilating without causing cold draughts, by various means; Principles of Warming; Health Questions; Combustion; Open Grates; Open Stoves; Fuel Economisers; Varieties of Grates; Close-Fire Stoves; Hot-air Furnaces; Gas Heating; Oil Stoves; Steam Heating; Chemical Heaters; Management of Flues; and Cure of Smoky Chimneys.

=Lighting.=--The best methods of Lighting; Candles, Oil Lamps, Gas, Incandescent Gas, Electric Light; How to test Gas Pipes; Management of Gas.

=Furniture and Decoration.=--Hints on the Selection of Furniture; on the most approved methods of Modern Decoration; on the best methods of arranging Bells and Calls; How to Construct an Electric Bell.

=Thieves and Fire.=--Precautions against Thieves and Fire; Methods of Detection; Domestic Fire Escapes; Fireproofing Clothes, etc.

=The Larder.=--Keeping Food fresh for a limited time; Storing Food without change, such as Fruits, Vegetables, Eggs, Honey, etc.

=Curing Foods for lengthened Preservation=, as Smoking, Salting, Canning, Potting, Pickling, Bottling Fruits, etc.; Jams, Jellies, Marmalade, etc.

=The Dairy.=--The Building and Fitting of Dairies in the most approved modern style; b.u.t.ter-making; Cheesemaking and Curing.

=The Cellar.=--Building and Fitting; Cleaning Casks and Bottles; Corks and Corking; Aerated Drinks; Syrups for Drinks; Beers; Bitters; Cordials and Liqueurs; Wines; Miscellaneous Drinks.

=The Pantry.=--Bread-making; Ovens and Pyrometers; Yeast; German Yeast; Biscuits; Cakes; Fancy Breads; Buns.

=The Kitchen.=--On Fitting Kitchens; a description of the best Cooking Ranges, close and open; the Management and Care of Hot Plates, Baking Ovens, Dampers, Flues, and Chimneys; Cooking by Gas; Cooking by Oil; the Arts of Roasting, Grilling, Boiling, Stewing, Braising, Frying.

=Receipts for Dishes.=--Soups, Fish, Meat, Game, Poultry, Vegetables, Salads, Puddings, Pastry, Confectionery, Ices, etc., etc.; Foreign Dishes.

=The Housewife's Room.=--Testing Air, Water, and Foods; Cleaning and Renovating; Destroying Vermin.

=Housekeeping, Marketing.=

=The Dining-Room.=--Dietetics; Laying and Waiting at Table; Carving; Dinners, Breakfasts, Luncheons, Teas, Suppers, etc.

=The Drawing-Room.=--Etiquette; Dancing; Amateur Theatricals; Tricks and Illusions; Games (indoor).

=The Bedroom= and Dressing-Room; Sleep; the Toilet; Dress; Buying Clothes; Outfits; Fancy Dress.

=The Nursery.=--The Room; Clothing; Washing; Exercise; Sleep; Feeding; Teething; Illness; Home Training.

=The Sick-Room.=--The Room; the Nurse; the Bed; Sick Room Accessories; Feeding Patients; Invalid Dishes and Drinks; Administering Physic; Domestic Remedies; Accidents and Emergencies; Bandaging; Burns; Carrying Injured Persons; Wounds; Drowning; Fits; Frost-bites; Poisons and Antidotes; Sunstroke; Common Complaints; Disinfection, etc.

=The Bath-Room.=--Bathing in General; Management of Hot-Water System.

=The Laundry.=--Small Domestic Washing Machines, and methods of getting up linen; Fitting up and Working a Steam Laundry.

=The School-Room.=--The Room and its Fittings; Teaching, etc.

=The Playground.=--Air and Exercise; Training; Outdoor Games and Sports.

=The Workroom.=--Darning, Patching, and Mending Garments.

=The Library.=-Care of Books.

=The Garden.=--Calendar of Operations for Lawn, Flower Garden, and Kitchen Garden.