Retrofpec? af German Literature.—-Mathematics, Sc. 
is judicioufly compiled from the beft au- 
thorities. 
Baron Von Mott continues his valu- 
able “* Annalen der Berg- und Hiitten- 
kunde’*—Annals of Mines and Metal- 
lurgy. TIEMANN gave, as an appen- 
dix to his ‘* Syftematifche Ejifenhiiiten- 
kunde—Sy#ematic Initruétions for the 
Working of Iron Mines, a §* Differta- 
tion on the proper Mode ‘of forming 
Moulds and cafting the Metal ;’’ and 
StuxkeL, * Eine Befcreibung der Eifen- 
bergwerke, &c. auf dem Haize’?’—a 
Deicrijtion of the Iron Mines and Foun- 
derics of the Harz: thefe two latter works 
may be recommended as abounding with 
ufeful information. The fame may be 
faid of SCHMIEDER’s ‘ Verfuch einer 
Lithurgik, oder Skonomifche Mineralo- 
gie ;”—or, Economical Mineralogy. 
Befides thefe more or lefs general or 
mixed works, there appeared a great num- 
ber of publications on particular fubjects. 
BauMGARTNER, an ative bookfeller of 
Leipzig, who gives employment toa great 
number of au horsand artifts, and is him- 
jelf an author, furnifhed, befides continu- 
ations of the ‘* Magazin aller neuen Er- 
fndungen”—Magazine of all new Inven- 
tions, and of the ** Magazin zur Befor- 
devung der Induftrie’—Magazine for the 
Furthering of Induftry ; a Defcription, by 
hinteif, of his new-invented Windmill, 
and ** Direétions how to read, or execute 
the fineft Works, without Injury to the 
Eyes”? He likewife publified works 
on the trades of baking, joinery, and 
feveral economical and technical ma- 
chines. 
Pa_MER, of Leipzig, prefented to the 
public a whole collection of his inventions, 
fuch as fire-places for the faving of fuel ; 
means to prevent conflagrations, and to 
render it impoffible to jorge paper money. 
Many of his inventions, however, are too 
infignificant to merit notice. HeyNe 
and STEINER propofed plans for building 
fire-proof houfes. Bus, Mutuer, &c. 
recommended contrivances tor faving fuel.” 
KOsentHaL fhewed how to make tiarch 
during the time that linen is wabhing ; 
and feveral others taught the art of dif- 
tilling, brewing, vinegar-making, &c. 
with, as they «flert, many new improve- 
ments. And how much would the Jift 
of thefe new inventions and improvements 
be fwelled, if the cuftom of taking cut 
paten:s for them prevailed as much in 
Germany, as in France and England! 
O! the works on fubje&s relating to 
commerce, the §* Comptoir Lexicon ;"— 
ov, Counting-houfe Dictionary, in nine 
683 
languages, by Mr. Nemnicu, already 
advantageoufly known by fimilar lexi- 
cons far natural hiftory, &c. deferves to 
be particularly pointed out to the notice 
of our readeis, on account of its great 
ufetulnefs not only to merchants, but like. 
wife to men of other profeffions, uncon- 
nected with trade. —-SCHEDaL, who 
continued his literary Jabours with 
unabated activity till the time of his 
death, likewife deftined his ‘* Geograph. 
Lexicon”’ for the ufe both of merchants 
and others.—-SCHULZ, director of a com- 
mercial {chool in Berlin, publifhed the firtt 
volume of his ** Commercial Academitft.’® 
Wacner, of Magdeburg, an author who 
for feveral years ‘pa@ has diligently cul- 
tivated this department of knowledge, 
recommended to the notice of his ccun- 
trymen, the Englith, or Mr. Jones’s, 
Syfem of Book-keeping ; which had like- 
wife been treated of before by ieveral other 
writers :—-WaGNER likewile gave models 
of mercantile letters, and inliructions for 
accurately calculating the value of money 
and the courfe of exchange. —Of Zim- 
MERT’s Pocket-bock for Merchants, there 
appeared at. Vienna the third year; anda 
_ new one at Erturt. 
MATHEMATICS AND MILITARY SCI- 
ENCE. 
Befides Ready Reckoners for merchants 
and other men of butinefs, there regularly 
appears every year a great number of 
books of arithmetic, fome of which are 
diftinguifhed by giving inftructions. for 
executing calculations withaut notation. 
In very tew of thefe elementary is arith- 
metic treated of in fo luminous and com- 
prehenfive a manner, as in SN&ELL’s Syf- 
tems of Arithmetic and Algebra, and in 
the Treatifes on pure Mathemarics in ge- 
neral, by Haurr, Ive, and LogENz. 
O: the works on particular branches 
of Mathematics, the moft worthy cf nc~ 
tice was the collection of papers, publith- 
ed by Proteflor HiINDENBURG, of Leip- 
zig, relative to the Combinatory Analytis 
and Calculus of Derivation, invented by 
him. In this colle&tion, the Profeffor and 
others, have further purfued and iiluic 
traced their method. Profcflor Hit- 
wic, of Bran{wick, endeavoured in a very. 
happy manner to facilitate the ftudy of. 
diophantic ana:yfis, by his ‘* Anfangs- 
grunde der unbeftimmten Analytik ;"— 
or, Fir Principles ot Indefioite Ana- 
ly fis. i, 
Mixed mathematics were again illuf. 
trated by feveril publications. Von 
RuHove, acap:in in the PruMfian army, 
4 U2 turuihed 
