380 
NOTES AND QUERIES. 
[20d S, No 19., May 10, °56, 
And over the door of his bed-chamber : 
“ Hic Crato cum medicis Musas conjunxit amcenas, 
Nostrum opus et vitam Christus Apollo regat.” 
At Salamanca, over the University library : 
y “Tnitium Sapientise timor Domini.” 
At Seville, round the celebrated Geralda tower : 
“ Nomen Domini fortissima turris.” 
At Toledo, on a high tower in the city walls, 
and under some statues of saints : 
“ Vos Domini Sancti, quorum hic presentia fulget, 
Hane urbem et plebem solito servate fayore.” 
A road-side inscription : , 
“ Straverunt alii nobis, nos posteritati, 
Omnibus ut Christus stravit ad astra viam,.” 
Over the doorway of Sawston Hall : 
“Sub Jesu numine sif genus et domus.” 
Cryrep. 
On John Knox’s house, High Street, Edin- 
burgh : 
“Lyfe God abufe al, and yi nychbbovr as yi stlf. 
“ Builded a. p. 1490.” 
jets eile 
. 
RECORD’s “ GROUND OF ARTS.” 
(2"" §. i. 79.) 
Mr. Pisuey Tompson, in his notice of this 
work, says it was “originally dedicated by Robert 
Record to Edward VI. in 1551.” This date is a 
mistake, as the volume was first printed by Re- 
ginald Wolfe in 1549. (See Herbert’s Ames, i. 
600.) He goes on to say, “It continued to be 
the book in most general use until the publication 
of Cocker’s Arithmetic in 1677.” This is not 
exactly the case, as “‘ Cocker ” did not quite super- 
sede it. I have before me a volume with the fol- 
lowing title: 
“Arithmetick; or the Ground of Arts: teaching that 
Science, both in whole Numbers and Fractions. Theori- 
cally and Practically applied in the Operation and So- 
lution in Numeration, Addition, Substraction, Multiplica- 
tion, Division, the Rules of Proportion, Fellowship, 
Barter, Rules of Practice, Exchange of Coin, Loss and 
Gain, Tare, Trett, and other Questions relating to Weights 
and Measures, Lengths and Breadths, Equation of Pay- 
ments, Commission to Factors, Rules of Alligation, and of 
False Position, &c. Originally Composed by Dr. Record, 
and others. And now perused, Corrected, new Metho- 
dized, much Improved; and thereto added, I. A New 
Treatise of Decimals, with the Demonstration of each 
Rule, and the Relation it has to Vulgar Fractions; also 
why Decimals are wrought as whole Numbers, &c. 
II. Tables of Simple and Compound Interest, with the 
Manner of Calculation, and use thereof in Resolving all 
the most necessary Questions concerning Interest and 
Discount of Money; the Purchasing or Selling Estates, in 
Land or Houses, in Presentypor Reversion, in Fee or for 
time Limited, and for Fining off Rent, &c. III. The 
easiest Method of Extracting the Square and Cube Roots 
of Numbers, whole or broken, and the use thereof in many 
material Instances. By Edw. Hatton, Philomercat. 
London: Printed by J. H. for Charles Harper, at the 
Flower de Luce against St. Dunstan’s Church, and Wil- 
liam Freeman, at the Bible against the Middle Temple 
Gate, in Fleet Street. 1699. 4to., pp, 203 +82.” 
The preface thus opens: 
“Though the Original Author of the following Treatise 
was one of the most Eminent Arithmeticians of his time 
(as appears by the great variety of Compendious and 
Excellent Rules therein, and the Esteem and Credit the 
Book acquired for near 150 Years together) yet at length 
the Stile and Phrase growing obsolete, and some Errors, 
for want of the Author’s Correction in Reprinting, having 
crept in, the Booksellers (not willing so choice a piece of 
Arithmetick should be lost for want of a little Publishing, 
the Principal parts being Extraordinary) were pleased to 
recommend the performance thereof to me,” &c. 
Prefixed to the volume is a portrait of “KH. 
Hatton, Atat. Sue 35, 1699,” drawn and en- 
graved by R. White. Query, was this Edward 
Hatton the author of the New View of London, 
published in 1708 ? Epwarp F, Rimpacvrr. 
PHOTOGRAPHIC CORRESPONDENCE. 
Mr. Lyte on a New Process for printing Photographs. 
—In the course of some experiments on photographic 
printing, I have hit on a process which is very remark- 
able as threatening completely to abolish hypo from the 
photographic laboratory. It depends on the fact that the 
phosphate of silver darkens under the influence of light 
(a property first noticed by Dr. Fyfe), and its complete 
solubility in an acid liquid. I have already produced 
very fine results by its means, and see a fair promise of a 
subsequent improvement. The method, asI employ it at 
present, is as follows: — The paper is salted on a solution 
of phosphate of soda, 7.e. the common or tribasic phos- 
phate, containing 1 part of phosphate to 25 of water. 
When dry it is to be sensitised with a solution of nitrate 
of silver containing 1 of nitrate to 5 of water, and after 
drying is to be exposed as usual. When printed it is to 
be placed in a solution of nitric acid, composed of 1 of 
acid to from 30 to 35 of water. Here the sensitive phos- 
phate instantly dissolves, and in fiye minutes the process 
of fixation is complete. It is now to be washed in one or 
two waters, and then to be placed in the colouring bath, 
which may be either sel d’or, as described by Mr. Sutton, 
or the acid bath of chloride of gold, described by Legray. 
Sel d’or, however, gives the finest tones. If the proof be 
thought too dark when finished, it may, after being passed 
through a bath of water, in which has been dissolved a 
bit of carbonate of soda, be placed in a bath of very weak 
cyanide of potassium, not more than 2 or 3 to 1000 of 
water. Great care is, however, requisite in this treatment, 
as the action of the cyanide is most energetic even when 
thus diluted. Otherwise, after a short washing with one 
or two changes of water, it may be deemed fixed and 
ready to We dried and finished. It should be rubbed 
when mounted with the encaustic of wax and turpentine. 
This process is doubtless capable of much improvement. 
Thus I have not the least doubt that if the proof were 
first washed, phosphoric acid might be advantageously 
substituted for the nitric fixing-bath; and it yet remains 
to be found out how to produce the requisite tone in the 
proof without the intervention of a separate colouring 
