Figurarum
De Formatione Pulli explicatio.

Explanation of the figures
concerning the formation of the chick

[62] Primae figurae Ovi secundi diei ab incubatione.
A. Pars ovi obtusa in qua nihil formatum apparet sed tantum maiorem concretionem albumen est adeptum.

figure 1 – of an egg on 2nd day of incubation.
A - Obtuse side of the egg where nothing formed appears, but the albumen acquired only a greater condensation.

2. Figurae 3. ovi.
B. Membrana {corion} <chorion> dicta.
C. Vasa umbilicalia per {corion} <chorion> discurrentia.
D. Rami maiores qui a centro prodeuntes in circumferentia circulum efficiunt.
E. Vitellus cui haec omnia innatant.

figure 2 – of an egg on 3rd day
B – The membrane called chorion
C – Umbilical vessels running through the chorion
D – Larger branches which starting from the centre make a circle at the periphery
E – Yolk on which all these things float

3. Figurae 4. ovi.
F. Corpus pulli in centro apparens ut minimus pulex.
G. Membrana {corion} <chorion> magnitudinis instar un da otto[1].
H. Plures vasorum ramusculi e corpore pulli prodeuntes.

figure 3 – of an egg on 4th day
F – The body of the chick visible in the centre and resembling a very small flea
G – Membrane of the chorion of the size of about one eight real coin
H – Many small branches of vessels coming out from the body of the chick

4. Figurae 4. ovi.
I. Foetus extractus caput, et spinam habens.
K. Foetus ad ovi medium declinans.

figure 4 – of an egg on 4th day
I – Extracted fetus with head and spine
K – Fetus turning toward the central part of the egg

5. Figurae 5. ovi.
L. Membrana maior, et foetus.
M. Foetus extractus caput, et spinam habens.
N. Vasa umbilicalia a foetu deorsum vergentia

figure 5 – of an egg on 5th day
L – The major membrane and the fetus
M – Extracted fetus with head and spine
N – Umbilical vessels extending down from the fetus

6. Figurae 6. ovi.
O. Foetus maior qui conglobatus apparet.
P. Vasa umbilicalia maiora.
Q. Foetus primus extractus membrana convolutus.
R. Foetus secundus conglobatus.
S. Foetus tertius extractus.
T. Caput maius reliquo.
V. Oculi magni, et eminentes.

figure 6 – of an egg on 6th day
O – Fetus larger which appears rolled up
P – Major umbilical vessels
Q – First extracted fetus and enveloped by the membrane
R – Second fetus rolled up
S – Third extracted fetus
T – Head larger than the rest
V – Large and prominent eyes

7. Figurae 7. ovi.
A. Diminutus Vitellus magis quam in praecedentibus.
B. Foetus extractus {eiusdam} <eiusdem> magnitudinis ut in sexto.
C. Vesica quae in capite eminet quae pro cerebro assumitur.

figure 7 – of an egg on 7th day
A – The yolk smaller than in previous stages
B – The fetus removed of the same size as on 6th day
C – Bladder protruding on the head and interpreted to be the brain

8. Figurae 8. ovi.
D. Foetus maior in quo corpus formatum apparet.
EE. Vena, et arteria in umbilicum{ ingredientia} <ingredientes>.
F. Foetus extractus.
G. Alae quae formari incipiunt.
H. Crura.
I. Vasa umbilicalia umbilicum ingredientia.
K. Caput magnum.

figure 8 – of an egg on 8th day
D – Fetus larger in which the body appears formed
EE – Vein and artery entering the navel
F – Fetus removed
G – The wings beginning to be formed
H – The legs
I – Umbilical vessels entering the navel
K – Large head

9. Figurae 9. ovi.
L. Foetus grandior, et vasa maiora.
M. Foetus extractus.
N. Oculi omnino formati apparent.
O. Rostrum formatum.
P. Vasa cum membrana umbilico inserta.

figure 9 – of an egg on 9th day
L – The fetus and the vessels are larger
M – Fetus removed
N – The eyes appear completely formed
O – Beak formed
P – Vessels inserted in the navel along with the membrane

10. Figurae 10. ovi.
Q. Foetus in medio ovi existens.
R. Foetus extractus.
S. Vesica phaseoli aut renum instar caput obvolvens.
T. Caput absolute formatum, et purum.
V. {Corion} <Chorion> membrana apparens foetu in aquam coniecto.

figure 10 – of an egg on 10th day
Q – Fetus located in the middle of the egg
R – Fetus removed
S – A vesicle shaped like a bean or kidneys winding the head
T – Head completely formed and perfect
V – The membrane of the chorion appearing when the fetus is immersed in water

11. Figurae 11. ovi.
A. Foetus grandior.
B. Foetus extracti oculi reliquarum partium amplissimi.

figure 11 – of an egg on 11th day
A – Fetus larger
B – Eyes of the fetus removed from the egg which are much larger than the remnant parts

12. Figurae 12. ovi.
C. Foetus in ovo conglobatus.
D. Vasa maiora, et ampliora.
E. Foetus extracti pes dexter formatus, et digiti discreti, et vasa, cum membrana umbilico appensa.

figure 12 – of an egg on 12th day
C – Fetus rolled up in the egg
D – Vessels longer and larger
E – Right formed foot of the removed fetus, toes separated and vessels, with membrane attached to the navel.

13. Figurae 13. ovi.
F. Foetus grandior.
H. Foetus primus extractus cum vitello albumine, et vasis.
I. Vasa per vitellum, et albumen propagata, et rami vasorum ex oculis egredientium.
K. Foetus secundus extractus.
L. Membrana quae albumen investit.
M. Membrana quae vitellum circundat.
N. Membrana tertia foetum obvolvens.
O. Foetus tertio perfectus in quo pennae pullulare incipiunt.

figure 13 – of an egg on 13th day
F – Fetus larger
H – First fetus removed with yolk, albumen and vessels.
I – Vessels strewn through yolk and albumen, and branches of vessels emerging from eyes.
K – Second removed fetus
L – Membrane covering the albumen
M – Membrane surrounding the yolk
N – Third membrane winding the fetus
O –Fetus perfected for a third on which the feathers are beginning to sprout

Quatuor sequentes Figurae quae indici praeponi debuerant, exhibent quotidianas in formatione pulli perfectiones et observationes, a decimoquarto die usque ad vigesimumquartum, idest usque ad exclusionis tempus. Numeri ergo singulis figuris additi diem designant, a tempore incubationis. Partium vero pulli distinctio facile colligitur ex tabula indici praefixa; ut minime necessarium fuerit ea causa insculpere figuris notas distinctarum partium indices.

The following four figures, which should have been placed before the index, show the improvements and the observations of every day about the formation of the chick starting from 14th until 24th day, that is, until the time of hatching. Thence the numbers added to each figure designate the day starting from the beginning of the incubation. The distinction of the parts of the chick is easily inferred from the table placed before the index, so that it was quite unnecessary to add to the figures the indicative notes of the single parts.

The egg after 14-15-16 days of incubation

The egg after 15-16-17-18 days of incubation

The egg after 19-20 days of incubation

The egg after 21-22-23-24 days of incubation