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JOHN CASSELL, LA BELLE SAUVAGE YARD, LUDGATE HILL.

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IN bringing our Fourth Volume to a close, we heartily thank all our Subscribers for their steady and unwearied support. The letters of encouragement and of commendation which we have received during the past six months, have been more numerous and more gratifying than ever. We have endeavoured to show our sense of these favours, by labouring more earnestly to impart solid and useful instruction in various important branches of learning; we have, in fact, considered that we were entrusted by our readers with the responsible task of their education, and we `ave aimed at fulfilling our duties to their satisfaction. We have given a concise and popular summary of the leading facts in several branches of Natural Philosophy, as may be seen by consulting the Index; but many highly useful and interesting departments are soon to follow in their order; these are Caloric and Optics, or the doctrines of Heat and Light, including some of their most interesting applications, as the Steam Engine, the Telescope and Microscope, Daguerreotype and Photography; Magnetism and Electricity, including the nature of the Telegraph, the Electrotype, and other useful applications; and, as soon as possible, Astronomy, which is much in demand.

Chemistry has also been treated in a highly popular manner, and has converted a great number of our Subscribers into practical Students of that art. The elegant languages of ancient Greece and of modern Rome have also occupied our pages, and have been expounded with great care by the authors of the Lessons on these branches of Literature; nor have we forgot our Students in French, as a "Course of Readings" in that popular language is still appearing at convenient intervals. The Mathematics, including Algebra and Geometry, with Instrumental Arithmetic and Mathematical Illustrations, have also been progressing under our own care, and these branches will be still more vigorously pursued in our next Volume, where some of them, if possible, will be brought to a conclusion. Bookkeeping has already occupied a portion of our labours, and we shall conclude this branch in a few early Numbers, with the subject of Foreign Trade. The Lessons in Reading and Elocution will be rendered still more useful and attractive in our next Volume; but we cannot promise any new language till we have finished one or more of those now in hand; the German, however, is very near a conclusion. We are preparing for Lessons in Mechanical Drawing, and in various other branches which have been unavoidably, postponed, on account of the great demand for those which we have given, and which we are now carrying on. In closing these remarks, we can only say that we shall continue to place before our Readers, as we have always striven to do, those subjects which are the most in demand, and which are calculated to do "the greatest possible good to the greatest possible number.”

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LXXVIII. The Infinitive; Government of Verbs; etc
LXXIX. Government of Verbs; the Past Participle
LXXX. Remarks on the Foregoing Rules, etc........

LXXXI. Adverbs of Negation; the Preposition

LXXXII. The Conjunction, its regimen; Collocation of

Words....

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26 VIII, IX., X., XI. The Third Declension; Paradigms 10,39, 55, 71
42 XII., XIII. The Second Declension contracted; the Three

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Declensions reviewed; Exercises, etc......97, 115

XIV., XV. Comparison of Adjectives; General View 124, 170

185

XVI. Adverbs; Comparison of Adverbs

XVII., XVIII. The Pronouns; Personal; Reflective ;

Reciprocal; Possessive; Demonstrative; Rela-
tive; Indefinite and Interrogative, etc....209, 222
XIX. The Numerals; with Declension of the First 235
XX. Numeral Adverbs; Remarks; General View.. 244
XXI., XXII. The Verb; Voices, Tenses, Moods; the
Participle; Numbers; Conjugations; Prefixes,
Suffixes, Stems; the Verd to be
282, 307

...

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V. Of Diphthongs; Third Pronouncing Table

VI. Fourth Pronouncing Table

VII., VIII. Fifth Pronouncing Table

IX. Sixth Pronouncing Table, Accents, etc...

X. On the use of the Apostrophe

XI., XII. The Articles; Declension of Nouns
XIII., XIV., XV. Use of the Preposition or
Di; etc,

XVI. Use of the Particle a: Vocabulary
XVII., XVIII. Use of the Preposition Da; etc.
XIX. Use of the Preposition In; etc.
XX. Use of the Preposition Con; etc.....
XXI. Use of the Preposition Per, and Exercises......

LESSONS ON MUSIC.

103, 110

133

147

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356

181

XXVI. Physical Theory of Music; Quality of Musical
Sound; Unison; Gamut; Diatonic Scale;
Intervals, Sharps and Flats; Harmony, Dis-
cord; Pulsation; Tuning Fork; Vibrations
of Rods, Plates, and Membranes

LESSONS IN READING AND ELOCUTION.

I. Punctuation; Characters employed

II. The Period; the Note of Interrogation; the

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VI. Laws of Gravity; the Pendulum.
VII. Molecular Forces; Particular Properties of
Solids; Tenacity of Metals, etc.
VIII. Hydrostatics; Properties of Liquids; Piesome-
ters; the Principle of Pascal; Pressure in
Liquids from Gravity; Hydrostatic Paradox 105
IX. On the Equilibrium of Liquids, in single and
communicating vessels; the Hydraulic Press;
Levels and Levelling; Fountains and Arte-
sian Wells

X. Bodies immersed in Liquids; Principle of
Archimedes; Hydrostatic Balance; Meta-
centre; Specific Gravity; the Areometer
XI. Specific Gravity; Tables of the Specific Weights
of Solids and Liquids; use of these Tables ..
XII. Areometers; Nicholson's and Baumé's Areome-
ters; Gay-Lussac's Densimeter
XIII. Hydrodynamics; Efflux of Liquids; Liquid
Vein; Vena Contracta; Theorem of Torri-
celli; Discharge, theoretical and effective, etc.

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