Skip to main content
Membership
Donate
Shop
Venue hire
Search
Royal Museums Greenwich
Main navigation
Menu
Royal Museums Greenwich
Search
Close
Plan your visit
Back
Plan your visit
Tickets and prices
Getting here
Accessibility
Family visits
Group visits
School visits
Cutty Sark
Cutty Sark
Open daily 10am-5pm
Last entry 4.15pm
Adult: £22 | Child: £11
Members go free
Free
National Maritime Museum
National Maritime Museum
Open daily 10am-5pm
Last entry 4.15pm
Free entry
Booking recommended
Free
Queen's House
Queen's House
Open daily 10am-5pm
Last entry 4.15pm
Free entry
Booking recommended
Royal Observatory
Royal Observatory
Open daily 10am-5pm
Last entry 4.15pm
Adult: £24 | Child: £12
Members go free
What's on
Back
What's on
Exhibitions
For families
Member events
Talks and tours
National Maritime Museum
Exhibitions
ZWO Astronomy Photographer of the Year exhibition
See the world's greatest space photography at the National Maritime Museum
Cutty Sark
Family fun
Cutty Sark Easter holidays
Climb aboard Cutty Sark and enjoy workshops, live performances and fantastic family activities across the Easter holidays
National Maritime Museum
Family fun
Astronomers Take Over
This brand-new interactive gallery gives curious minds aged 4 to 104 the space to play, learn and explore!
Stories
Back
Stories
Maritime history
Space and astronomy
Art and culture
The ocean
Time
Royal history
Must-see artworks in the Queen's House
What to look out for in the inspiring new take on the Queen’s House’s displays in 2026
Artemis Programme: what you need to know about NASA’s Moon missions
NASA's Artemis missions aim to land humans on the Moon again, create a lunar base, and lay the groundwork for a future trip to Mars
'Observing the Universe reveals how small yet precious we are'
An accident led Takanobu Kurosaki to rediscover life’s beauty and fall in love with astrophotography. Explore his image shortlisted in ZWO Astronomy Photographer of the Year 2025
Collections
Back
Collections
Conservation
Research
Donating items to our collection
Collections Online
Search our online database and explore our objects, paintings, archives and library collections from home
The Prince Philip Maritime Collections Centre
Come behind the scenes at our state-of-the-art conservation studio
Caird Library
Visit the world's largest maritime library and archive collection at the National Maritime Museum
Learn
Back
Learn
School trips and workshops
Self-guided school visits
Online resources and activities
Booking an on-site schools session
Booking a digital schools session
Young people and youth groups
Support us
Back
Support us
Become a member
Donate
Corporate partnerships
Become a patron
Leave a legacy
Commemoration and celebration
Our sites
Cutty Sark
National Maritime Museum
Queen's House
Royal Observatory
Membership
Donate
Shop
Venue hire
Search
Beta
Back to search results
An essay on the different modes of communication by signals ...
Back to search results
Share:
Link copied to your clipboard!
Record details
Publisher:
W Miller
Pub date:
1797
Pages:
122p, 7 plates
Holdings
Order
Call Number
627.72:094
Copy
1
Item ID
PBC0956
Material
RARE-BOOK
Location
Onsite storage – please ORDER to view
Order
Call Number
627.72:094
Copy
2
Item ID
PBC0957
Material
RARE-FOLIO
Location
Onsite storage – please ORDER to view
Loading filters
Royal Museums Greenwich
Close
Search
Want to search our collection? Search here.
Back to top