CONTENTS.

CHAPTER I.
	Page.
Invention of Spectacles and Burning Glasses	[1]
Examination of Opticians—Artful Impositions	[2]
Duke of Wellington and the Bubble Schemes	[4]
Basis of Optical Knowledge—Physiology of the Eyes	[6]
CHAPTER II.
Failure of Sight and the Application of Spectacles	[10]
Lenses—how to determine their Focal Lengths	[12]
Brazil Pebbles—Periscopic and Parallel Lenses—Process of	[13]
Working—Tests of Quality—and Experiment	[14]
Railroad Spectacles—Neutral Tint Shades	[16]
Country-made Spectacles—Trial Box of Sight	[18]
CHAPTER III.
A Visit to the Optician—Rules for selecting Spectacles	[21]
Spectacle Frames—Russian Remedy for Short Sight	[24]
Solid Blue Steel Spectacles	[26]
Anti-pressure Spectacles—Single Eye Glasses injurious	[27]
Prices of Spectacles	[28]
CHAPTER IV.
Specious Quackery—Testimonial Writers	[30]
Amber Spectacles analysed—Puffing Advertisement	[33]
Opinions of Dr. Neill Arnott, Dollond, Curtis, &c.	[34]
Absurdity and Ignorance of Puffing Advertisers,	[36]
CHAPTER V.
Instances of Gross Imposition—Clarified Crystals and Coloured Pebbles!	[37]
Naval and Military Officers—Definition of Law	[39]
Ladies and Spectacles—Persevering Roguery	[41]
An Old Clothes Man Metamorphosed	[43]
CHAPTER VI.
Specimens of Puffing Advertisements,	[44]
Royal Patronage—Cataract Alarmists	[45]
Abstract of Act of Parliament	[46]
Newspaper Paragraphs,	[50]
CHAPTER VII.
Provincial and Metropolitan Scheming	[52]
Public Cautions—Tricks at Brighton	[56]
Liverpool Mercury—Parabolic Cheats	[60]
CHAPTER VIII.
Correspondence with the Duke of Wellington	[61]
—— Frederick Tyrell, Esq. J. Hodson, Esq.	[62]
Signatures of J. Soden, Esq., J. F. Ledsam, Esq., —— Alexander, Esq.	[64]
Correspondence with Robert Keate, Esq.	[64]
Pretended Discoveries, Humorous Scraps, &c.	[66]

SPECTACLE SECRETS.