Or, The Art of Abreviating those Studies which give the greatest 
Labor to the Memory; including Numbers, Historical Dates, 
Geography, Astronomy , Gravities, $'c.; a/so i?w/es yor 
Memorizing Technicalities, Nomenclatures , Proper Names, 
Pfbse, Poetry, and Topics in general. Embracing all 
the available Rules found in Mnemonics or Mnemotechny 
of Ancient and Modern Times. To which is 
added a perpetual Almanac for Two Thousand 
Years of Past Time and Time to Come. 
By LORENZO D. JOHNSON. 
THIRD EDITION, REVISED AND IMPROVED. 
NOTICES OF THE PRESS. 
This system of Mnemotechny, differing considerably from the one intro¬ 
duced by Prof. Gouraud, is designed to furnish all the rules for aiding the 
memory without lessening mental culture, which can be made available 
during a course of elementary study. The illustrations may be easily com¬ 
prehended by any person of ordinary mental capacity ; and the application 
of the principles upon which the system is based, must necessarily furnish 
an agreeable and useful exercise to the mind. It is well adapted to common 
school instruction, and may be made a very profitable study, if rightly 
pursued. It should be a source of gratification to every friend of literature, 
that these formulas appear without any effort to excite the marvellous, and 
enshroud its principles in mystery. Every page of the work gives evidence 
of a desire to present the laws of association distinctly and clearly, so as to 
enable the learner to establish such relations between things, events, &c., 
as will aid the memory. We commend the book to teachers and all inter¬ 
ested in this important subject.— New York Teachers ’ Advocate. 
It is most emphatically an aid to the memory , and as such, is well adapted 
to common school instruction. We heartily commend it to public notice. 
Temperance Standard. 
We had the pleasure, a few days since, of attending a recitation of young 
ladies, in the Rev. Mr. Winslow’s school, in this city, in Mnemonics. The 
readiness with which the young ladies could apply Mr. Johnson’s system of 
Mnemonics to the memory of dates and numbers, through the long succes¬ 
sion of English Sovereigns, and in other connections proposed by gentlemen 
present, convinced us that the system affords decided facilities for aiding the 
memory.— New England Puritan. 
This is the title of a work on Mnemonics, prepared for the use of schools. 
The peculiar improvement of this system on that of Gray’s ‘ Memoria Tech¬ 
nical consists in giving a numerical value to consonant sounds, which, by 
the aid of vowels, can be made into date words, conveying to the under¬ 
standing, as well as to the memory, a familiar idea, and thus making a two¬ 
fold impression to the retentive faculties. The question which the work 
presents is this : — Can words, which are the representatives of ideas, be 
more easily retained in the memory than figures ? The author has given 
opportunity to test this question in more than four thousand date words, 
which are placed opposite the same number of well selected facts, in the book 
before us — facts which must be useful to all lovers of useful knowledge. 
We feel no hesitation in recommending this work to the deliberate 
attention of teachers, and the guardians of youth. We learn that it is 
received into several schools in Boston, and used as an auxiliary help to the 
studies now pursued by the pupils.— Boston Courier. 
The Memoria Technica is now studied in some of our best schools ; and 
the system taught in it appears to be much approved by those who have 
made trial of it.— Evening Traveller. 
